Great idea for kids! Buy a ceramic white plate (dollar store) and let the kids make a picture with sharpie pens, then bake for 30 minutes. Clean Magic eraser will take off any unbaked sharpie mistakes.
These blow paint monsters are genuinely amazing. I love this idea. Kiddie City Note: On construction paper place dots of paint, no more than half and inch apart, in the shape of the monster. Add eyes and mouth while the paint is wet.