Solarbotics Solarbotics Marble Machine Kit - Battery Edition
You are probably familiar with its older cousin, the Solar Marble Machine that has a clever circuit that delivers short bursts of energy collected by the solar cell to the gear wheel. The battery pack edition of the Marble Machine kit has splendid electromechanical appeal, delivering 8 steel balls down a laser-cut wood frame. Unlike its solar-powered cousin, its ready to run at your command.
Solarbotics Marble Machine Kit - Battery Edition
Usually ships in 1-3 business days.