Using these scratch animal door hangers is easy. Just grab a coin or a similar sharp - edged object and start scratching the surface of the hangers to reveal the design underneath. You can let your creativity flow and make each hanger look one - of - a - kind. Remember, these hangers are for kids aged 3 and up, so adult supervision might be needed for younger children. To keep them in good condition, avoid getting them wet and store them in a dry place. If they get dirty, you can gently wipe them with a dry cloth.