Frequently Purchased Together
Everything is cooler when it’s glow-in-the-dark! Now the popular soda bottle science toy is available in glow-in-the-dark green. The Glow in the Dark SQUIDY puts an eery spin on the cartesian diver as a ghastly, glowing squid sinks and floats inside of the bottle!
Squeeze the plastic soda bottle and SQUIDY swims up and down in the bottle of water. Children can’t help but ask, “How does that work?” The illustrated instructions show how to construct the Cartesian diver and explains the scientific principle behind its action.
Recommended for children ages 6 and up.
What Does It Teach?
The Cartesian Diver is a classic science experiment that’s hundreds of years old. It’s named for a Frenchman, René Descartes (1596-1650), who made huge contributions in the fields of philosophy, math, and science. The original Cartesian Divers were made out of glass medicine droppers or delicate glass ampules.
When you have the water levels adjusted correctly in your new, unbreakable divers, you should see the water in the diver rise as you squeeze the bottle. The air trapped in the pipette compresses into a smaller space and the diver’s weight increases. It becomes less buoyant and it sinks. When you release the squeeze, the compressed air expands and forces water out of the diver, allowing it to float to the top of the bottle.