Order early for pre-holiday delivery. Flinn (or Educational Innovations) 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.
DC10393
Price: FREE
Demonstrate your mastery of density by determining the maximum amount of sand that can be placed in a plastic vial and still allow the vial to float in water. Calculate the amount carefully—you only get one chance!