K'NEX Solar Power 10 Model Set
This unique new product allows your young architect to build 10 solar-powered models indoors or outdoors. It takes the light of a light bulb and turns it into power. The models can spin and turn, all controlled by your young builder. There are clear directions on what to build, including wheels and bicycle. This is a project that will be instructive and enjoyable for a long time as it can be done in many different variations, over and over again.