Use of video content is at own risk. Dry ice is -78C and is very cold and poses risk for instant frost-bite on bare skin. To avoid frost-bite on bare skin, handling of dry-ice should be approached with caution and attempted with gloves or other protection. There are risks associated with these projects that require adult supervision.
#5. Make it impossible to relight a candle in a glass or bowl #4. Create "self inflating" party balloons #3. Make a "Ziploc popper" that goes bang #2. See how to make metal coins scream and shake #1. Levitate bubbles in mid air
These projects and results are depictions of my own personal experiences. Your results may vary depending on your experience, and modifications to the ideas.