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radicalfrog
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posted 2/27/03 6:15 AM
Take a polystyrene disposable cup. Cut a circle out of clear contact paper (sticky on one side - usually used to cover books)- bigger than the opening of the cup. Cut small slits in the edges so as to make the circle fit properly onto the cup and put over mouth of cup so it is sealed. Also put a rubber band around the top to keep contact in place Pierce a hole in the bottom of the cup and about 12 small holes in the contact. Dip the contact into a detergent solution. Blow through the bottom of the cup and watch the bubbles come out the other end.
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