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.
- Beginner skill level - ages 12+
- Basic hand tools required (Phillips screwdriver, craft knife, wood glue). No soldering required.
- 2 x AAA batteries required (not included)
- 2 hour build time
- 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