Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.
DC10918
Price: FREE
It’s a race! Investigate the properties of the moment of inertia by rolling differently shaped objects, such as a solid disc, ring, and sphere, down an incline. Discover why the sphere always wins!