I collected my two children in the kitchen and we did a few quick demonstrations.
- First, we used a room-temperature fork from our utensil drawer to make the dry ice vibrate and sing.
- Next, I lit a candle, and proceeded to put out the flame by pouring the gas from a container of dry ice over it.
- Placing the dry ice in a larger container, we added water and a squirt of dish soap. Not only does the dry ice begin to turn to a gas and look spooky and smoky, but the soap makes "smoke"-filled bubbles. Scooping the bubbles out onto our hands, we were able to pop them for an awesome smoky effect, releasing the carbon dioxide therein.
- Finally, I soaped the rim of the bowl and drew a soap-saturated piece of material across the mouth of it. This formed a layer of soap, effectively sealing the bowl and containing the gas. A large bubble formed and grew as it filled with carbon dioxide. When it popped, the "fog" escaped and fell down the side of the bowl.