I am a den leader for my son's Cub Scout pack. I am teaching 3rd graders about basic electronics in preparation for the Boy Scouts robotics merit badge. Tonight in fact, we built a few very basic circuits with some simple components and a breadboard. We used a battery some resistors, caps, switches, pots and an LDR to make some really basic circuits. The kids had a lot of fun with it. I plan on covering motors next (maybe we'll make a tin-can motor or something).