My Robotic Pet: Tumbling Hedgehog Mechanical Kit

Children can build their own adorable robotic hedgehog with this 172-piece kit that allows them to learn about the science of mechanics. The robot has a built-in sound sensor and is programmed to react to different sounds. After it is built, you can play with it by making different sounds and watching it tumble, roll, spin around, bristle its spines and scurry. Clap once, and the hedgehog will roll into a ball and tumble backwards. Clap multiple times, and the hedgehog will count your claps and tumble as many times as you instructed with your claps.