Things You'll Need
Instructions
Cut a sliver of dry ice. You can get dry ice at many ice retailers, grocery stores and ice cream stores. Use a sharp knife and cut a sliver of dry ice.
Cut the dry ice into small pieces and place it inside aluminum foil shaped into a small bowl. Size the bowl to fit your model.
Set the aluminum foil inside the model. Push the dry ice into the center of the aluminum foil bowl. Use tongs to move the dry ice slivers. As the dry ice melts, it creates the appearance of steam.