While intended for kids, I personally would love to build some of these toys [1]. Motors with just a battery and some wire [2]. A plastic hydrogen bomb [3] (okay, maybe not that, given the recent events in Asia). Or how about the radio [4] out of a few transistors, three pennies, some caps, some resistors, salt, vinegar, crumpled aluminum and a stainless steel bowl (or three)?
Way cool stuff here. This almost makes me wish I had the WWW (World Wide Web) when I was a kid.
(I found the link via 0xDECAFBAD [5])
[2] http://www.scitoys.com/scitoys/scitoys/electro/electro.html#motor
[3] http://www.scitoys.com/scitoys/scitoys/echem/echem.html#bomb
[4] http://www.scitoys.com/scitoys/scitoys/radio/three_penny/three_penny.html
[5] http://www.decafbad.com/news_archives/000186.phtml#000186