Make-Believe Marble

Directions

1. 1
   Put water in a container.
2. 2
   Sprinkle plaster on water until a thick, creamy mixture forms.
3. 3
   Add glue to plaster mixture.
4. 4
   Drip some tempera over the plaster and stir until the mixture looks streaked.
5. 5
   Pour into a mold and let harden.