Okay so first watch this video:
In a zippy demo at TED U, AnnMarie Thomas shows how two different kinds of homemade play dough can be used to demonstrate electrical properties — by lighting up LEDs, spinning motors, and turning little kids into circuit designers.
Okay now that you’re blown away, and looking for a battery and some Playdoh. How freaking cool is that? Most of the toys and equipment available to teach kids engineering & code are pretty pricey. But creating Playdoh circuits is not only cool, but it’s dirt cheap.
I plan on doing this with my kids this week. I’ll take some photos of them making a mess.