To make an ice sculpture, you need one or more blocks of ice, and some sculpting tools - a wide variety of tools can be used including chisels, saws, molds, lathes, computer numerical control machines, and chainsaws. Your choice of tools depends on the size and style of your sculpture.
For one small sculpture, carving with hand tools like chisels is enough. If you are making a big one or need to finish many sculptures quickly, then you might need some machinery. Sometimes heat, in the form of propane torches, is used to make carved surfaces clear. There is also equipment needed for the display and storage of your creations, like specially made trays and freezers.
Before using machinery to sculpt ice, it is recommended to ask an experienced sculptor for advice. Also, make sure to use protective gear to prevent injury.