For this activity, you need paper, crayons and something to scratch with. This could be anything that is a little bit sharp, such as a paperclip, small screwdriver, spare key, etc. You can try different items to see which one works the best. Don't use something that may cut, like a knife or scissors. First, press hard on your crayon to cover up all the white on a small piece of paper. Then scratch some off to make your picture or words. Try using different colours to see if it works better on some that on others.