Sidewalk Chalk
["3 Tbsp. plaster of Paris mix", "1 1/2 Tbsp. cold water", "1 tsp. colored tempra paint"]
["Mix plaster of Paris and cold water together slowly.", "Add colored paint.", "If mixture is a little dry, add a little more water.", "Pour into styrofoam egg cartons and let dry overnight."]
["plaster", "cold water", "colored tempra"]