- Put some rice into glass cups or small bowls.
- Add a few drops of food coloring and stir, stir, stir.
- Find some sturdy cardboard and cover with lots of glue. Spread it around to a thin layer.
- Sprinkle the colored rice over the glue.
The idea is inspired by sand art, but is a tad easier to clean up. A warning though, the food coloring takes a long while to dry on the rice, and will rub off on hands in the short term.