Fun with Dry Ice

Dry ice is another name for the solid form of carbon dioxide. It is colder than water ice, but can be handled safely with gloves. Metacafe has a really neat video of the classic dry ice fog demonstration, with a twist. After water was added to the dry ice, hand soap was pumped into the fog. The resulting cascade of bubbles is fun, but what makes this video interesting is the way the bubbles vanish in a puff of fog when touched. This is a definite 'must try'.

Fortunately, dry ice is easy to locate around the winter holidays. You can get it from a specialty gas company, such as one that deals in oxygen, helium, and nitrogen, or you can get it from stores that ship perishable food. Bakeries and seafood shops can often hook you up, or you might ask a popular restaurant if they carry dry ice.
Make Dry Ice Fog | Make Frozen Bubbles