Learn about pressure and buoyancy with this clever little Jellyfish Diver! It’s a fun, educational and hands-on science experiment for the engineering and biology-minded mini scientist! Drop your little jellyfish in a plastic water bottle and squeeze to make them bob and dance. Requires a refillable water bottle (not included).

Squeeze the bottle hard and your jellyfish will sink quickly. Similarly, your jellyfish will float up when you let go. When your jellyfish is moving up, try squeezing and releasing the bottle over and over again. Your jellyfish will rotate and dance as it moves back up the bottle.

Three jellyfish in assorted colors, chosen at random from our stock of red, blue, orange and pink.

• Perform amazing hydrodynamic tricks
• Learn about buoyancy and changes in pressure
• Make this jellyfish dance in a bottle of water
• Colors vary, chosen at random according to availability