What Does Blue Want to Make? - S1-E15
Visible crew/equipment: A boom mic is visible when Steve starts singing "We Just Got A Letter."
Continuity mistake: When Steve sings the Blue's Clues theme, he is wearing tan shoes he wore in few other episodes. When he drops his notebook after the theme, he is back in his brown shoes.
Blue Wants to Play a Song Game - S1-E14
Revealing mistake: After Blue and Steve play the monkeys jumping on the bed game with the sock monkey, when the mail time song plays Steve gets up excitedly and his arm and hand get cut off.
Blue Wants to Play a Game - S1-E12
Other mistake: The jigsaw puzzle Steve and Blue help Shovel and Pail with has a picture of everyone playing musical chairs from the Mailbox's Birthday episode, but Steve suddenly isn't in the puzzle. He played musical chairs, so he should've been in the puzzle.
Character mistake: When Steve and Blue are at the table setting up Blue's Birthday party outside, Mrs. Pepper is seen standing on the left before she and Mr. Salt bring cupcakes. She and Mr. Salt would've been heading out the door.
Visible crew/equipment: As Steve skidoos back home from the present store, a boom mic is visible above his head.
Continuity mistake: The package Steve received from Mailbox is briefly visible before Mailbox comes in.
What Does Blue Want to Make? - S1-E15
Visible crew/equipment: A boom mic is visible when Steve starts singing "We Just Got A Letter."
What Game Does Blue Want to Learn? - S2-E15
Continuity mistake: When Steve and Blue are in the felt frame playing Tic Tac Toe, the X on his shirt is larger but as he skidoos back home, the X is smaller.