Cornstarch and water tinted with food coloring and painted on the sidewalk. Washes away with the hose.
What You’ll Need
1cupcornstarch
1cupwater
Food coloring ("a few drops" per bowl)
Measuring cupsmixing bowl
Paint brushes
6small plastic bowls or a muffin tin
Chalk; spray bottle filled with water (optional)
Directions
Stir 1 cup water and 1 cup cornstarch together until smooth and lump-free.
Split it among 6 small bowls or the cups of a muffin tin.
Stir a few drops of food coloring into each.
Paint with brushes. The colors look watery at first and get brighter as they dry.
Notes
Safety: NOT a food, though the ingredients are taste-safe. Food coloring can stain light concrete, clothes and shoes; test a small spot first. Paint where there's no traffic and with an adult watching.