Start a papier mache sculpture with bunches of newspaper. To create fake fruit or vegetables from papier mache, crumple up a few wads of newspaper and shape them together with thick masking tape to form a rough outline of the fruit or vegetable you intend to make. Then coat the sculpture with long strips of newspaper that have been soaked in a papier mache solution made from one part flour and two parts water. Let the sculpture dry.
Coat the food sculpture with a mixture of papier mache paste and glue, and let the paste dry completely. Finally, paint the sculpture with colored craft paint and clear varnish.
Use modeling clay to make detailed food sculptures or sculptures that are very tiny. First, use pencil and paper to draw a rough outline of what you would like your finished sculpture to look like. Then draw each separate component of the sculpture. Using your fingers, roll out and shape pieces of the modeling clay to form each part of the sculpture. Stick them together by pressing them lightly with your fingertips or using a thin layer of craft glue. To finish, add detail work with a toothpick or very sharp pencil.
To bake and harden the polymer sculptures, coat a baking sheet with aluminum foil and place the sculptures on the sheet. Bake in an oven at 270 degrees Fahrenheit for a half hour; then remove the sculptures from the oven and let them cool to harden completely .
Make a disposable, natural food sculpture with sand or snow. Keep a small glass of water on hand to harden packed snow or thicken fine sand if necessary. Begin at the bottom of the sculpture and work up, shaping and forming as you go. For a slice of watermelon, start with the part of the slice that would touch a flat surface, and shape the sides outward. Then form the seeds and indentations. To do detailed indentation work on snow or sand food sculptures, use twigs or the wooden handles of brooms.