Build and power a robot that requires no batteries! This Green Science kit is a fun and handson experiment that helps you discover the possibilities of alternate energy resources. With just a drop of salt water your robot will roll along the floor!

Includes: 2 complete charcoal battery kits (each kit can power the robot for approximately 60 minutes of play time) required materials and detailed instructions.

Robot measures approximately 3 high x 2.25 wide x 2 long. (when assembled).

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