craft idea for kids- monster pet rocks. Pre-paint rocks and they can draw faces. I have a lot of googly eyes I can bring in. This can be a cheap project. Maybe high school kids can paint the rocks. Maybe use half Easter eggs if short on rocks?
Painting with ice. All you need to do is fill an ice cube tray with liquid water color and water. Stick a strand of tape directly on top of the ice cube tray. This is so the toothpicks will stay in place while freezing.