My 7 year old LOVES when her new Crunch Labs Creative Kit comes in the mail. I feel like it's just the right amount of difficult so that she has some small challenges putting it together, but she can still do it all by herself, which is great for building her confidence! She likes the different types of buildings she gets each time, they are lots of fun! She especially likes seeing which new animal she will get.
A word of warning for some of the kid, the materials are quality made, so some of the dyes and stuff will stain your floors/tables/ect. It's not a problem because I like her working with real materials, but we just have to be mindful of where she is playing.