Video of Mark Rober Introducing Build Box

All Build Boxes

Solo Build Box (Opened)

Boy Assembling Build Box

All Components of a Build Box

4.8

Rated 4.8 out of 5 stars

1,043 Reviews

Build Box Subscription

Pick Your Plan

Build Box Subscription

Annual (Pay Annually)

This subscription automatically renews annually and you can turn it off up to 3 days prior to the end of the subscription term in "My Account" or by emailing help@crunchlabs.com. *No Purchase Necessary. Ends 5/31/26. 50 U.S. & D.C., 18+. See Official Rules: crunchlabs.com/platinum.

Build Box Subscription

Camp CrunchLabs (Pay Once)

This subscription automatically renews and you can turn it off up to 3 days prior to the end of the subscription term in "My Account" or by emailing help@crunchlabs.com. Already a Build Box subscriber? No action needed - you are enrolled in Camp! *NO PURCHASE NECESSARY. Ends 7/16/25. 50 US/DC, 18+. Grand Prize winner must travel 7/20/25-7/22/25. See Official Rules: crunchlabs.com/camp-rules.

Build Box Subscription

Quarterly (Pay Every 3 Months)

This subscription automatically renews quarterly and you can turn it off up to 3 days prior to the end of the subscription term in "My Account" or by emailing help@crunchlabs.com. *No Purchase Necessary. Ends 5/31/26. 50 U.S. & D.C., 18+. See Official Rules: crunchlabs.com/platinum.

Build Box Subscription

Annual (Pay Annually)

This subscription automatically renews annually AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Build Box Subscription

Annual (Pay Monthly)

This subscription automatically renews annually AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Build Box Subscription

Quarterly (Pay Every 3 Months)

This subscription automatically renews quarterly AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Build Box Subscription

Annual (Pay Annually)

This subscription automatically renews annually AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Build Box Subscription

Annual (Pay Monthly)

This subscription automatically renews annually AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Build Box Subscription

Quarterly (Pay Every 3 Months)

This subscription automatically renews quarterly AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Build Box Subscription

Annual (Pay Annually)

This subscription automatically renews annually AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Build Box Subscription

Annual (Pay Monthly)

This subscription automatically renews annually AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Build Box Subscription

Quarterly (Pay Every 3 Months)

This subscription automatically renews quarterly AND you can turn it off prior to renewal. *No Purchase Necessary. Ends 5/31/25. 50 U.S. & D.C., 18+. See Official Rules (crunchlabs.com/platinum).

Pick Your Plan

Annual (Pay Annually)

$27.45 / box
Camp CrunchLabs (Pay Once)

$27.45 / box
Quarterly (Pay Every 3 Months)

$32.95 / box
Annual (Pay Annually)

$27.45 / box
Annual (Pay Monthly)

$29.95 / box
Quarterly (Pay Every 3 Months)

$32.95 / box
Annual (Pay Annually)

$22.45 / box
Annual (Pay Monthly)

$24.65 / box
Quarterly (Pay Every 3 Months)

$26.95 / box
Annual (Pay Annually)

$29.95 / box
Annual (Pay Monthly)

$32.95 / box
Quarterly (Pay Every 3 Months)

$35.95 / box

You pay:

$329.40 ~~$395.40~~ (Paid each year)

Get 12 STEM toys in 12 weeks of virtual summer camp with our Camp CrunchLabs subscription special!

This accelerated Build Box subscription is designed to keep your kiddos busy every single week of the summer (our normal subscription is monthly).

Each box contains a chance to win a Platinum Ticket - a trip to CrunchLabs to meet & create with Mark Rober.*

Plus, this summer we are releasing a new video every single Saturday morning!

FREE US SHIPPING

This subscription converts to month-to-month after 12 weeks and you can turn it off up to 3 days prior to the end of the subscription term in "My Account" on crunchlabs.com or by emailing help@crunchlabs.com. *NO PURCHASE NECESSARY. Ends 7/23/25. 50 US/DC, 18+. Grand Prize winner must travel 7/20/25-7/22/25. See Official Rules: crunchlabs.com/camp-rules.

You pay:

$329.40 ~~$395.40~~ (Paid once upfront)

You pay:

$98.85 (Paid every 3 months)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Purchase this annual subscription upfront and get 2 months free (discount already included; no code needed)

You pay:

$329.40 ~~$395.40~~ (Paid each year)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Commit to an annual subscription (paid monthly) and get 1 month free (discount already included; no code needed)

You pay:

$29.95 ~~$32.95~~ (Paid each month)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Commit to 3 months, pay quarterly

You pay:

$98.85 (Paid every 3 months)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Purchase this annual subscription upfront and get 2 months free (discount already included; no code needed)

You pay:

$269.40 ~~$323.40~~ (Paid each year)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Commit to an annual subscription (paid monthly) and get 1 month free (discount already included; no code needed)

You pay:

$24.65 ~~$26.95~~ (Paid each month)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Commit to 3 months, pay quarterly

You pay:

$80.85 (Paid every 3 months)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Purchase this annual subscription upfront and get 2 months free (discount already included; no code needed)

You pay:

$359.40 ~~$431.40~~ (Paid each year)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Commit to an annual subscription (paid monthly) and get 1 month free (discount already included; no code needed)

You pay:

$32.95 ~~$35.95~~ (Paid each month)

A new build-it-yourself toy each and every month
Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero
Each box comes with a chance to win a trip to the CrunchLab to hang out with Mark Rober. Ends 5/31/24. 50 U.S. & D.C., 18+. No purchase necessary. See Official Rules
Free shipping in the US & discounted international shipping
Commit to 3 months, pay quarterly

You pay:

$107.85 (Paid every 3 months)

Peek Inside Some of the First 12 Boxes

Disc Launcher

STEM Principle: Flywheel

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Disc Launcher

Flywheel

A flywheel is a mechanical device that stores rotational energy. Basically, it stores energy by spinning. Your Disc Launcher uses the rotational energy (spin) of the flywheel to launch its discs. When a disc touches the flywheel, the flywheel gives some of its stored energy to the disc.

Peek Inside this Box

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Coin Spinner

STEM Principle: Ratchet

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Coin Spinner

Ratchet

A ratchet is a device that allows rotation in only one direction. Basically, it only turns one way. It uses special teeth to lock a wheel in place. For the Coin Spinner, when you pull the ratchet back, the teeth lock to store the energy of the rubber band until you release it with the trigger. Then, it transfers stored energy to the coin.

Peek Inside this Box

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Trip Wire

STEM Principle: Momentum Transfer

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Trip Wire

Momentum Transfer

Momentum transfer is motion passing between objects. Basically, one thing bumps into something else. When the Trip Wire is triggered, the kicker lever swings into the foam ball. The energy transfers from the kicker to the ball, just like kicking a soccer ball. Energy is never lost!

Peek Inside this Box

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Drawing Machine

Drawing Machine

STEM Principle: Linkages

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Drawing Machine

Linkages

A linkage uses pivoting bars to guide a machine’s movement. Basically, linkages help things move. The Drawing Machine uses linkages to guide a pen in complex but predictable patterns. The arms are connected to wheels that spin at different speeds. The arms also pivot in difference places, changing where the pen goes.

Peek Inside this Box

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Domino Catapult

Domino Catapult

STEM Principle: Projectile Motion

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Domino Catapult

Projectile Motion

Projectile motion is the curved path of a launched object. Basically, it’s the science of tossing stuff. Domino Catapults can launch balls to the same spot over & over due to projectile motion. The motion of a projectile is affected by the angle (trajectory), the force (velocity), and gravity. Keep those the same each time you launch to predict where the ball will land.

Peek Inside this Box

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Strobe Light

STEM Principle: Light Refraction

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Strobe Light

Light Refraction

Light reflection is light hitting an object and then bouncing off of it. Basically, it’s light changing directions. The squirrel animation is made by etching tiny scratches into clear acrylic. The light wants to pass through the acrylic, but when it hits the scratches, it gets reflected out the front. That’s why the squirrels appear to be glowing!

Peek Inside Box 6

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Mirror Bank

STEM Principle: Mirrors

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Mirror Bank

Mirrors

Mirrors are smooth surfaces that reflect a clear image. Basically, it’s light changing directions. Your Mirror Bank uses the reflective surface of a mirror to create an illusion of an empty box. The box is only half empty, but because the mirror reflects the empty half perfectly, your eye is tricked into seeing one entirely empty box.

Peek Inside this Box

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Boomerang Car

STEM Principle: Worm Gear

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Boomerang Car

Worm Gear

A worm drive is a gear that changes the axis of rotation 90°. Basically, it’s a gear that turns a corner. Worm drives are often used to change the orientation of gear. Notice that the Boomerang Car uses a worm drive to flip vertical rotation from the motor into horizontal rotation of the red & blue switch. As a result, the Boomerang Car’s motor, wheels, and switch all move as one.

Peek Inside this Box

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Duck Game

STEM Principle: Belts

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Duck Game

Belts

A belt is a loop of material used to carry objects or transfer energy. Basically, belts move stuff along. The belt on your Duck Game carries the ducks in an endless loop. The rollers drive the belt forward, bringing the ducks along for the ride...

Peek Inside this Box

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Air Ball

STEM Principle: Coanda Effect

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Air Ball

Coanda Effect

The Coanda Effect is the tendency of air to follow an object's curvature. Basically, air can wrap around things like a net. The Air Ball game takes advantage of this effect. As the ball enters the airstream, air “wraps” around the ball suspending it in a bubble of air pressure. That bubble of pressure acts like a magnet and keeps the ball centered in the stream.

Peek Inside this Box

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Airplane Launcher

Airplane Launcher

STEM Principle: Springs

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Airplane Launcher

Springs

A spring stores mechanical energy through elastic deformation. Basically, springs store energy by stretching. The spring in your Airplane Launcher stores energy when you pull your string back and releases energy when you let it go. Your spring returns to its original shape after being stretched due to elastic deformation.

Peek Inside this Box

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Rocket Revolver

Rocket Revolver

STEM Principle: Compressed Air

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Rocket Revolver

Compressed Air

Compressed air holds a greater pressure than the atmosphere. Basically, it’s tightly-packed air. The Rocket Revolver is powered by compressed air. When you stomp the pump, you're pressurizing the air inside. That air wants to escape back into the lower-pressure atmosphere. The only way for the air to escape back into the atmosphere is by shooting the rocket out of the way.

Peek Inside this Box

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How It Works

1

Build

Build your own toys with simple step-by-step instructions.

2

Play

Play the included games and challenges you get for free with every new toy.

3

Think

Think about how it all fits together with mind-blowing exclusive videos from Mark Rober.

Frequently Asked Questions

SEE ALL FAQS

Can kids build and play with the toys on their own?

Yes! We design each toy to be a little bit challenging for kids 8–12+, in the same way a good puzzle is challenging.

Each box has materials to guide you:

A step-by-step illustrated instruction booklet
An instruction video where Mark Rober walks builders through each step

With the help of the instruction video and booklet (and just a dash of tenacity!) tons of kids are able to build and play independently with Build Box.

For what age is Build Box designed?

CrunchLabs Build Boxes are designed for kids ages 8-12+.

We test every product with 3rd-party testing agencies to ensure the products comply with US and EU safety standards for kids ages 8-years and older.

Parents and guardians can gauge the appropriateness for their kids, but we have worked hard to ensure that they’re a blast for the intended age range - and for anyone who loves learning!

Do I need tools or other materials to complete the projects?

Nope! All the stuff you need to make the toy is included in the Build Box, even batteries.

You will need an Internet connection and a kid-safe device to watch the Mark Rober video episode, but you don’t need the video episode to complete the build.

If there are parts missing, go to your My Account portal and visit the page for your toy to order FREE replacement parts. If you have further questions contact help@crunchlabs.com.

Your Build Box might have a Platinum Ticket!

Each Build Box contains a chance to win a Platinum Ticket* like the Golden Ticket in Charlie and the Chocolate Factory.

How it Works
One Build Box is selected at random and a little extra piece of hardware goes inside. The lucky winners visit the real life CrunchLabs to meet & create with Mark Rober.

*No Purchase Necessary. Ends 5/31/26. 50 U.S. & D.C., 18+. See Official Rules.

Can I buy a single Build Box individually?

Currently, we don’t offer an option to purchase individual Build Boxes (though that may come down the road). We have carefully crafted multiple years of engineering fun and learning into our box sequences, so we think a subscription is the best.

If you want to be the first to hear about what we’ve got in store, join our mailing list (at the bottom of this page).

How long does it take to complete a Build Box project?

We design each Build Box toy to take an average 30-60 minutes for an 8-12 year old.

Every kid is different and build times will vary!

Are your products safe?

Of course! We test every product with 3rd-party testing agencies to ensure our products comply with US and EU safety standards for kids ages 8-years and older.

The safety standards check that the toy is safe and sturdy for its intended play, and that unsafe chemicals don’t make their way into the toy during production.

How is the cost of international shipping calculated for Build Box?

Here’s the bottom line: We’re doing our very best to deliver high quality products to you with the lowest shipping rates possible. Duties and taxes, along with other rates, will vary based on your location and subscription type, so please see the total calculated during checkout.

If you'd like a more detailed explanation of international shipping costs, please read on:

For non-US addresses, your total shipping fee will be shown to you during the checkout process.

Shipping internationally costs us a lot more, so we charge a little extra. We apply the value of free shipping within the US to your international shipping cost. Various extra taxes (including VAT) and duties may be collected upon checkout.

Some countries are subject to Delivery Duty Paid fees of about 70% per box. All associated charges are calculated at checkout.

Some countries are subject to Delivery Due Unpaid fees but are exempted from VAT, so these charges will NOT appear during checkout for regular subscriptions. However, bulk orders may be subject to VAT. Check out the VAT minimums noted below.

Hong Kong

VAT de minimis: N/A
VAT Rate: N/A

Japan

VAT de minimis: $64.97 USD
VAT Rate: 10%

Singapore

VAT de minimis: $293.90 USD
VAT Rate: 9%

South Korea

VAT de minimis: $200.00 USD
VAT Rate: 10%

SEE ALL FAQS

4.8

Rated 4.8 out of 5 stars

Based on 1,043 reviews

Total 5 star reviews: 956 Total 4 star reviews: 39 Total 3 star reviews: 23 Total 2 star reviews: 12 Total 1 star reviews: 13

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1,043 reviews

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Owen K.
Verified Reviewer
Reviewing
Build Box Subscription
I recommend this product
Rated 5 out of 5 stars
Yesterday
Grandson LOVES getting his Crunch Labs Boxes
Grandson looks forward to receiving his Crunch Labs box and now that they are coming every week in the summer, even more excited as noted in the attached video.
Was this helpful?
EB
erik b.
Verified Reviewer
Reviewing
Build Box Subscription
I recommend this product
Rated 5 out of 5 stars
1 week ago
Thanks Mark!
My daughter and I love putting these fun toys together. We talk about the engineering and physics that make them work and have an absolute blast in the process. It's so fun to watch her explore and learn. Thanks for all you do!
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RW
Rachel W.
Verified Reviewer
Reviewing
Build Box Subscription
I recommend this product
Rated 5 out of 5 stars
1 week ago
7 year old son loves!
My son has never liked traditional toys, he only likes toys that allow him to build something - so this was right up his alley! He can complete each build using the booklet without much help, I was worried it would be too complicated to build on his own since he's a little young. His grandfather is an aerospace engineer and they've bonded over these little engineered toys - which is such a delightful bonus! We found the toys first but the videos with the engineer guy showing you everything and the You Tube shows are such a great find - my son is now quoting him "that's not a failure, it's a clue", which honestly is my favorite part - something you'd never get from just buying a regular toy. Very happy we got this subscription, every time it arrives the whole family gets excited!
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