Temporary, Non-toxic, spray chalk. Easily turn outside surfaces into playing fields, games, signs or an outdoor masterpiece! Just pop the cap off shake and spray. Spray Chalk turns to powder as it comes out of the can creating cool sidewalk chalk looks with a spray can effect. Spray on grass, sand, glass, concrete, snow and more! The pet and vegetation friendly formula dissolves naturally in the rain. Can take up to 4 weeks for the colour to fade.