The glow in the dark stars are made of plastic material which absorbs light when exposed to it in order to glow in darkness. They are ideal for decoration on walls, doors, lamps,household articles, bedroom ceilings & any smooth clean surface. They are not limited to use during dark Parties, perfect for Birthday Parties, Party Favors, Football Party Supplies, Camping Trips, Halloween, Glow Party, Concerts, Weddings, School Classroom Rewards, Treasure Box, Carnival Prizes, Pinata Toys, Bath Tub Fun, Bars etc.They are long lasting and Child Safe, Non-Toxic, Waterproof and they have an adhesive sticker tape for attaching them on the surface.