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No batteries? Correct! Build 8 sun-powered robots including a crawling bug, a somersaulting armadillo, a roaring dino, a tank, drummer, and more wi...

How cool is it that the mainspring stores energy, then converts it to motion? Discover the physics of potential and kinetic energy and the inner wo...

Retro is rad, and this keychain version of Tetris is totally tubular for tweens, teens, and adults! It's the classic arcade game with a black and w...

Wordplay enthusiasts and kids who love to collect mini toys will find this teeny tiny Bananagrams set totally a-peeling! The classic word game you ...

Can you get the marble through the 5 mazes without getting stuck? Challenge yourself and your friends with this twisty, zig-zagging puzzle as you t...