Dry Ice can add the right touch to the typical school volcano. The "smoke" will come out the top and flow down the sides for several minutes. Inside the volcano must be a container to hold hot water. If hot water is not immediately available use a thermos to store it. The hotter the water is (nearly boiling if under adult supervision) the better. The bottom must be sealed tightly. Otherwise Dry Ice fog will leak out the bottom. Use putty or some other sealant. At the time of eruption, use gloves and put small pieces of Dry Ice into the hot water. The volcano will bubble and "smoke" for several minutes. Is it doubtful that cleaning services new york will be required but volcano projects can get pretty messy so plan for some clean up time.