Got a small one who still believes? Have her write a letter to Santa and bring it to Macy's. Children of all ages can bring their stamped letter addressed to Santa at any Macy’s and drop it off at Santa’s special Post Office Mailbox. For each person who brings a letter showing they “Believe” this holiday season, Macy’s will donate $1 to the Make a Wish Foundation. In efforts to help the children learn, Macy’s has also put together a Believe Letter Writing Kit that teaches children the basics of letter writing.