The Exploratorium
Science Snacks
Snacks about Fluids

Snack name


Bernoulli Levitator

Suspend an object in air by blowing down on it.

Bubble Suspension

Soap bubbles float on a cushion of carbon dioxide gas.

Condiment Diver

Squeezing a plastic bottle filled with water and a condiment packet makes the packet sink. Letting go of the bottle makes the packet rise.

Convection Currents

Make your own heat waves in an aquarium.

Descartes' Diver

To paraphrase the French philosopher René Descartes: "I sink, therefore I am."

Fog Chamber

Make a portable cloud in a bottle. Now you see it, now you don't!


Natural geysers form when underground chambers fill with water and are heated geothermally. When the water is heated to its boiling point, the geyser erupts, spewing its contents, and the cycle starts again.


Whirling water creates a tornado in a bottle.

Water Spinner

Rotating water has a curved surface.