Fun with dry ice

To learn about states of matter and phase changes, we study the properties of dry ice (solid carbon dioxide). Dry ice is unusual in that it sublimes, passing directly from the solid state to the gas without passing through a liquid phase. It is also extremely cold. These properties can be used to create a wide variety of interesting and entertaining demonstrations. For this lesson, groups of 4 students each produce videos of the dry ice demonstration of their choice from the following list:

Crystal Ball - Create a fog filled bubble of CO2 on top of a glass
Bubble Art - A mixture of soap, food coloring, and dry ice is used to transfer colored bubble patters onto paper
Super Soaker - Convert a 2 liter soda bottle into a pressurized super soaker with a straw and some dry ice.
Leaky Faucet - Create bubbles filled with foggy CO2 and play with them in your hands
Exploding balloon - put crushed dry ice in a balloon and watch it grow (and pop) as it sublimes
Floating Bubbles - float bubbles in an aquarium filled with CO2 (created by sublimed dry ice).
Water Fountain - create a pressurized water fountain out of a soda bottle and dry ice
Smoke Rings - form perfect smoke rings with a soda bottle, water, and dry ice
Heavy Balloon - demonstrate that CO2 is more dense than air by dropping balloons filled with each side by side.

Once the demonstrations are staged, filmed, and edited, they are uploaded to a science video website (SciVee.tv) to be viewed by other students. They are graded by both the teacher and peers during a "screening" using the following rubric:

Clarity – Did the video/actor explain what was going on and how it worked?
Accuracy – Everything that was said or represented was technically correct?
Professional – Was the video appropriate for an online educational website?
Content – Was there a chemistry or science component?
Interesting – Did the video catch your interest and leave you wanting more?