With this experiment kit, children aged 8 and up can build a robot that has a lot to offer. Thanks to the sound sensor, the hedgehog knows exactly which movements to perform. It walks, raises its spines, and even rolls backward. The glowing LED eyes indicate which mode the hedgehog robot is currently in. Plugging, clicking, and screwing together the 170 individual parts from the high-quality kit enhances fine motor skills and encourages methodical thinking while providing plenty of building fun. The instructions detail the process step by step. A comic story immerses children in the world of Nuna, Izzy, and Tom, revealing exciting information about robots and their mechanics. Contents: components for assembling the robot, including a pre-programmed circuit board with sound sensor, motor, and gearbox parts, instructions, and a screwdriver. Additionally required: 4 x 1.5-volt batteries type LR03 (AAA, Micro), scissors or side cutters, and a file.