Cut a 12 Inch by 41/2 Inch piece of fabric or felt, then fold it in half. This will be the base of the pillow. Good colors are Green, Red and Black. Lighter colors like White or Yellow would be hard to find teeth under.
Cut a tooth shape from Felt or Fabric and using craft glue attach it to the pillow. Using White would be best, as if you used Yellow, the tooth fairy might not think you brush your teeth quite good enough. When you glue it on, Leave the top of the tooth open. This is where you will put the teeth. Decorate the tooth with googly (Wiggle) eyes and a fabric pen. Be sure you let the ink and glue dry before the next step, or you will likely mess up.
Kids: Using yarn and a safe needle, sew through the felt with the needle. If you need to, get an adult to help you thread the needle and show you how to sew. Leave about 2 Inches open, then stuff with cotton. Your done!
Adults: Using yarn or thread, sew your felt / fabric with the needle and leave 2 or 3 Inches open, and stuff with cotton. Your done!