Make a very tiny letter from the tooth fairy and give your child an extra surprise when they loose their tooth. Cut a small square a write a letter from the tooth fairy. Fold in thirds like you usually do for a letter. Base the size of that to make your envelope. Trace a line around your envelope onto a piece of paper. Make a triangle going away from each side of your envelope. Cut and fold on lines. Seal with a drop of wax. What a little keepsake for your child to have when they grow up – after the child receives the letter attach the letter/envelope to a small baggie with the tooth.