The 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.

Measuring approximately twice as wide as our original Solar or Battery Marble machine kits (at 250 x 127 x 140mm, or 10" x 5" x 5.5"), the GraviTrack is still desk-top compact but large enough for easy mechanical assembly.

Specifications:

•     Beginner skill level - ages 12+
•     Basic hand tools required (Phillips screwdriver, craft knife, wood glue)
•     2 x AAA batteries required (not included)
•     2 hour build time

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

See the GraviTrack Solar