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.
DC11227
Price: FREE
Cartesian divers are great toys that can be used to teach important science concepts of density, buoyancy, and Boyle’s law. These concepts have applications in fish physiology, scuba diving, and submersibles. How can a craft be designed to retrieve an object from the ocean floor and bring it to the surface? Use Cartesian divers as models for designing and testing solutions to this and many other creative challenges.