Continuity mistake: The package Steve received from Mailbox is briefly visible before Mailbox comes in. You can also see a crew member's hand holding the package as Steve grabs it.
Blue's Clues (1996)
1 mistake in Magenta Comes Over - chronological order
Starring: Aleisha Allen, Steve Burns, Seth O'Hickory, Traci Paige Johnson
What Story Does Blue Want to Play? - S1-E16
Trivia: At the end when Steve sings the So Long song, he's impersonating Elvis Presley.