Continuity mistake: When Peppa and her family walk out their house to find Mr. Dinosaur, George is smiling. When Peppa and family arrive in front of the tree, George is frowning. (00:03:46)
Suggested correction: In the shot after the family walks out of the house, it takes about 7 seconds for George and the two parents to come into the shot. There is absolutely no doubt that they had enough time to change their facial expressions.
George Catches a Cold - S2-E20
Continuity mistake: When Peppa and her family come inside the house because of the heavy rain, the door behind Daddy Pig is open. But a few seconds later, the door is closed. (00:01:01)
Suggested correction: This doesn't occur between shots, and the 2 screenshots are not consecutive changes. The "few seconds later" is an 8-second close-up of George as he begins to sneeze, and the front door is not visible. Within those 8 seconds off-screen, there's time for the door to be closed and to set aside the two umbrellas.
Continuity mistake: They don't have teeth until they go to the dentist.
Suggested correction: We can see Peppa and George's teeth when Peppa asks George if his teeth are clean like hers. This is before they are at the dentist.