Solarbotics Solarbotics GraviTrack Battery Marble Machine Kit
Elegant, swooping hands pass marbles to each other to the top of a sweeping multi-level track. A switched battery pack smoothly exercises the mechanism. The smooth pick/hand-off/place motion is hypnotic and enchanting. No soldering is necessary.
Solarbotics GraviTrack Battery Marble Machine Kit
Usually ships in 5-7 business days. Limited availability. May not be in stock at time of order. No back orders.