What you need:
An old sock
A plastic bottle
Duct tape
Bubble solution
Simply cut out the bottom of the plastic bottle and pull the sock over it so it's tight. Duct tape the sock to the bottle. Then dip it into the bubble solution and blow! Be sure to talk about your lungs, breathing, and air, and you've got yourself a fun, educational science experiment.
NOTE: As illustrated in this video it's very important to blow out, not suck in when your mouth is on the bottle. A mouthful of bubbles is not very tasty, as Tommy can testify.
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