My robotic pet, Tumbling Hedgehog from Thames and Kosmos 2019. Construct a fascinating robot with sound sensor and LED lights. Program the robot with your claps Hedgehog bristles its spines, tumbles, rolls, spins, and scurries around! Includes 40-page full color manual, 172 building pieces, and 5 experiments. You will gain experience in the inner mechanical workings that enable the robot to move. Learn about gears, motors, sound sensors, LEDs and other components of this curious pet. Stem experiment kit, 2019 ASTRA winner of Best Toys for Kids!