Dry Ice Bubbling Cauldron

To make your own witches’ cauldron, submerge dry ice in water. When you place the dry ice into water, it will sublime. Sublimation occurs when a solid transitions into a gas, skipping the liquid phase. Dry ice is solid carbon dioxide, and at room temperature, exists as CO2 gas. The water quickly warms the dry ice bringing it into its gaseous state. This is a very similar phenomenon to cloud formation!

For more added fun, combine food coloring with the water before making contact with the dry ice.