activity was created by Exploratorium staff based on the artwork "Turbulent
Orb" by Ned Kahn.
- A small
clear plastic bottle with a tight-fitting cap--the more rounded the
bottle, the better.
hand soap that has glycol stearate in it (such as Colgate-Palmolive's
Softsoap©). Any brand with glycol stearate will work--check the
ingredients on the label.
Fill the bottle about 1/4 full with liquid soap.
Add a drop or two of food coloring.
Turn on your faucet so you have just a trickle of water.
Use that to fill up the rest of the bottle. (If you you the water too
hard, you'll get foam.) Make sure to fill the bottle all the way to the
Screw the cap on the bottle upside-down a few times to
mix the soap and water. If you get foam, take the cap off and trickle
some more water into the bottle. The foam will run over the edge. Recap
the bottle tightly.
Dry the bottle, then wrap clear tape around the top so
the bottle won't leak.
Twirl and shake the bottle to see smooth streakes and