Here’s the mail, it never fails. Kids will love pretending to wag their tails every time they receive a letter with the Blue’s Clues & You. Mail Time with Mailbox. Drop the letters in Mailbox and raise his flag to hear phrases from the show. Listen as Mailbox delivers each letter featuring a special message from kids’ friends from Blue’s Clues & You. - including six letters and one create-your-own letter that allows kids to use the included crayon to write their own special messages. Bring home the Blue’s Clues & You. Mail Time with Mailbox and the rest of the Blue’s Clues & You. toys to help your little clue-finder use their mind, take a step at a time, and do anything that they want to do. Requires 2 x AA batteries (included). Ages 3+