Science Experiments
DIY Cartesian Diver Submarine Bottle
The child will construct a working Cartesian diver inside a sealed bottle that sinks and floats based on applied pressure.
Grab 1–2 things 20 min Ages 6–11 years 1–2 players Indoor
Fine Motor SkillsScientific ObservationCause and Effect ReasoningProblem-SolvingFollowing Instructions
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Learning benefits
- 💡 Introduces the concepts of pressure, density, and compression.
- 💡 Demonstrates Archimedes' principle of buoyancy in a tangible way.
- 💡 Reinforces scientific method through testing and adjustment.
- 💡 Explores cause-and-effect relationships within a closed physical system.
Safety notes
- ⚠️ Adult supervision is recommended to ensure correct assembly and prevent spills.
- ⚠️ The eyedropper and small piece of clay can be a choking hazard for young children.
- ⚠️ Use a plastic bottle, not glass, to avoid breakage when squeezing.
Cleanup
- 🧹 Carefully pour the colored water down the sink drain.
- 🧹 Rinse the bottle, cap, and eyedropper with clean water and let them air dry.
- 🧹 Store the non-hardening modeling clay in an airtight bag or container for future use.