Joel got a Spiro for his birthday....pooling all of his money including some from Christmas. It is a remote controlled ball.....I guess you need to see it in person to understand the thrill. (and be young) He also bought the latest in a book series he likes, Unleashed. It is about a bunch of kids and their schemes and their pets. (The cover has a funny Doberman doing things related to the book theme.)
Here is Joel and his science fair buddy. The made a solar panel battery charger that can then be used to charge a cell phone or small electronic that has a USB connection. I don't think they understand the electronics perfectly and I KNOW we could have bought a bunch of electricity for the same price. That said, they did learn about circuits, etc. as well as team work and project planning etc.