Henry the Tooth Fairy thought of a new way to collect your baby teeth You can leave your tooth in the mailbox and write your tooth fairy a note They will leave you a reward for your clean, shiny tooth Milo Henry Moore invented the Tooth Fairy Mailbox for his second grade class project. He invented the mailbox because the Tooth Fairy sometimes forgot to come or his tooth was so well hidden under the pillow, the Tooth Fairy couldn't find it