Get just 3 friends to subscribe with your link, and we will ship you an adorable Phat Gus plush toy, signed by Mark Rober himself!

Who's Phat Gus? She's only the greatest bushy tailed athlete and master of physics in Mark's backyard, and a glutton for acorns. As made famous in this video.

This is in addition to the $10 in future store credit that you earn for each successful referral.

Referral Program Rules and Regulations