da Vinci's Catapult
When Leonardo da Vinci wasn’t busy painting, sculpting or otherwise being brilliant, he spent his free time drawing mechanical throwing machines. Now you can match wits with da Vinci and put your coordination skills to the test with this build-it-yourself, working recreation of his 15th Century catapult. With just an hour of assembly time, this bad boy can hurl a small clay ball over four meters, which comes in handy for ambushing pesky kid brothers or protecting cubicles from annoying coworkers. All pieces are pre-cut and made with natural, untreated wood from sustainable forests.
Okay, we admit it. Spitballs are kind of juvenile and they do very little for your brain cells. But these are not Spitballs. These are Braindrops - chemistry wonders that are a major step up from the old-school kind! For starters, they grow up to 200 times their original size when immersed in water, can be dyed with food coloring or flavored with beverages, and (most awesome of all) can be reused repeatedly. They’re designed for launching, bouncing, throwing, smashing, spitting from a straw, and other delightfully juvenile activities we have yet to think of.