GraviTrax Challenge

Thursday, December 17, 2026 · 3:45 PM – 4:30 PM

Harvard Public Library — 4 Pond Rd., Harvard, MA

GraviTrax Challenge – Ages 8 and up The challenge is to work as a team to build a marble raceway using the awesome Ravensburger GraviTrax interactive track building set. Can you design a system that gets the marble from the start all the way to the finish? Registration is required – enrollment is limited to 8 children ages 8 and up.