Keep It Short and Sweet. Part of the bestselling Letters to My … series with more than 4 million copies sold! Little Letters to Say Hello is quick and easy: write a little message, fold, seal, and deliver! Included are 75 little letters that fold into adorably small envelopes, perfect for: Inviting people to coffee Breaking the ice Packing in school lunches Seal letters with the 75 stickers included before before handing this little letter to its recipient and putting a smile on their face!