Kit includes 26 sturdy plastic mailboxes (Each mailbox includes a pull-down mail slot for easy delivery of parcels, and slide-open bottoms for convenient removal), in 6 colors, alphabet stickers, 78 miniature alphabet objects (3 for each letter), 92 plastic letter tiles (26 uppercase and 66 lowercase), sorting basket, and a step-by-step teacher's guide with reproducibles. Ages 3 and up.