Introduce the science of sublimation as you demonstrate how dry ice goes from a solid directly to a gas. With the Boo Bubble™ Generator, you can create fog-filled bubbles that will wow your students while they witness science in action. Fill the bubble generator with warm water and some dry ice, put the bubble blower into the solution, and create bubbles that burst in clouds of smoke. You and your students can actually hold these bubbles safely with gloves without popping them. Completing all science experiments in the kit requires five pounds of dry ice (not included).