GraviTrack Battery Marble Machine Kit

The GraviTrack is desk-top compact but large enough for easy mechanical assembly. 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. (GraviTrack is also available in a solar-powered version, which does require soldering.)

Specifications:

• Beginner skill level - ages 12+
• Basic hand tools required (Phillips screwdriver, craft knife, wood glue)
• 2 x AAA batteries required (not included)
• Estimated 2 hour build time
• Size: 10 x 5 x 5.5 inches (250 x 127 x 140 mm)

Kit includes:

• 1 x Set of laser-cut wood parts
• 1 x GM3 Motor + battery pack
• 1 x GMW Motor mount
• 4 x 3/8" steel marbles
• Assembly hardware