Have you ever wanted to build your own alien robot? Here's your chance! The Hydrazoid Kit from Elenco provides you with everything you need to build your own Hydrazoid - a cool, mysterious alien robot. Hydrazoid is extraordinary because it moves its four legs by responding to sound and is driven by a special DC motor. Hydrazoid Kit features detailed instructions and explanations for why and how each piece of the robot works. The Hydrazoid Kit, available from Educational Toys Planet, teaches your child about sensor technology, robotics, and basic engineering principles. All older children will love tinkering with cool technology, and showing off their final product. Requires 2 AA batteries.