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Handpicked collections from the Grommet team

  • Marble Race Expansion by GraviTrax® - 1
  • Marble Race Expansion by GraviTrax® - 2
  • Marble Race Expansion by GraviTrax® - 3
  • Marble Race Expansion by GraviTrax® - 4
  • Marble Race Expansion by GraviTrax® - 5
  • Marble Race Expansion by GraviTrax® - 6

Marble Race Expansion

Full Details

  • Please note: Choking hazard for children under three
  • Made in the Czech Republic
13.5" x 13.5" x 2.25"
1.6 lbs


Marble Race Expansion

starting at $24.95
choose option
Build, configure, and perfect a marble run┃Expansion sets and accessories amp up the fun
A GraviTrax expansion set builds on the fun a starter marble run set begins and makes it even more interesting to tinker with. A set helps a kid engineer take their track set-up to new heights or greater distance, or even incorporate an electronic element in the form of a marble-toting elevator, all while honing early STEM skills.


With over one hundred pieces and nine potential construction plans (plus whatever little engineers dream up on their own), the GraviTrax marble run set provides endless building, reconfiguring, and racing good times. It draws on STEM skills by giving kids hands-on experience with concepts like gravity, magnetism, and kinetics, and there’s some creative thinking needed, too—not that they’ll notice that. Kid builders will be too busy experimenting with height and trajectory and perfecting their twisting and turning race course. Expansion sets let a race track reach a grander scale, and accessories like a trampoline and cannon amplify the fun.
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