Elenco Snap Circuits® Product Line
There are a variety of SnapCircuits sets, and they are really cool ways to introduce kids to the idea of circuits. The age range says “8-108”, but we've started at earlier ages with our kids - we've just worked closely with them to show them how to read grid diagrams and help as needed. There is a kit focused on renewable energy, a small introductory kit, a very large kit, one focused on lights that can do a light show from music on your iPhone, etc. You can build a circuit that will play a radio station, or build one that transmits on a radio frequency that you can tune your radio to. You can build alarms, simple lights, fans, a “helicopter”, and more. Of all engineering-themes toys, this is one of our favorites. It's fun for adults, too.