Combine 1 cup cornstarch and 1 cup water with a whisk or spoon until smooth. Mix in more water if you prefer a runnier consistency. Divide the mixture into the different compartments of a muffin tin, a few small bowls, or repurpose a divided takeout or food container. Add food coloring to each separate container to create different colors of paint.

This paint can decorate your sidewalk, patio or driveway! Use paint brushes, mini rollers, or even sponges cut into shapes to make stamps. The paint will become more chalky as it dries. Extra paint can be stored in airtight containers.