Fastronauts
These toys are truly powered by play. Each figure has a rechargeable battery and each vehicle has a dynamo. Plug a Fastronaut into the bike-mounted rocket and pedal to power lights, sounds, a speedometer and an odometer. Each Fastronaut has a power indicator that can be pressed to make the figure talk. Children get instant feedback as they create energy for their Fastronaut figures while learning about energy generation. See 10 more gadgets.