Visible crew/equipment: As Steve skidoos back home from the present store, a boom mic is visible above his head.
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.
What Does Blue Want to Build? - S2-E2
Revealing mistake: When Mailbox first comes in, you can see the letter being moved into place behind Mailbox due to a small part of him being cut off. (00:13:00)
Steve Gets the Sniffles - S2-E1
Other mistake: During the mailtime segment, as Mailbox moves closer to Steve, a big chunk of him is cut off. (00:12:50)
Revealing 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.