Date: Wed, 9 Jun 2010 13:48:00 -
Author: Wright, Ann
Subject: Re: Smoke rings & natural causes
If you want to demonstrate smoke rings in class, I highly recommend one of these toys:
It makes really nice smoke rings. The smoke comes from heating "fog fluid" available in any party supply store. The ring is created by a spring-loaded thumper hitting a rubber membrane. Mine is about 5 years old and still works fine.