Stamp Book was a present that Steve and Blue got for Mailbox in "Mailbox's Birthday" and was later seen in the episode "Math!" as well as the remake "123's with Blue".
List of Letters (Mail) Blue's Clues, Blue's Clues Wiki
Category:Books, Blue's Clues Wiki
What Does Blue Want to Do with Her Picture?, Blue's Clues Wiki, Fandom
Mailbox, Blue's Clues Wiki
What Is Blue Trying to Do?, Blue's Clues Wiki, Fandom
What Does Blue Want to Do with Her Picture?, Blue's Clues Wiki, Fandom
Blue's Story Time, Blue's Clues Wiki
Mr. Salt, Blue's Clues Wiki
The Trying Game, Blue's Clues Wiki, Fandom
Slippery Soap, Blue's Clues Wiki