Hydrazoid is a cool alien creature that is fun to build. Hydrazoid moves in a spellbinding way in response to sound. To build this educational robot requires only basic hand tools. Kit contains detailed instructions and educational background information on each component used and why. The kit will teach the fundamentals of sensor technology and show you how it all goes together. No soldering required.

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Movement: Four legs driven by a DC motor Control: Sound sensor including condenser microphone Dimensions: 2-3/4" (H) x 1-3/4" (W) x 2-5/32" (L) Requires two (2) "AA" batteries