Continuity mistake: When Mr. Bean is sleeping on his bed, you can see his teddy bear's head. In the next shot after the nightmare, the teddy bear's head is gone.
Do-It-Yourself Mr. Bean - S1-E13
Factual error: On a close-up of Mr. Bean's calendar at the very beginning, New Year's Eve 1993 is depicted as a Saturday, but in reality, this day was a Friday. (00:00:40)
The Return Of Mr. Bean - S1-E2
Trivia: Just before the scene where Mr Bean meets the Queen, the commentary is actually done by Rowan Atkinson.
Answer: It's never been revealed.
May be able to find out more on the animated series.
Answer: In Mr Bean animated there is an episode where you see Mr Bean as a young boy and had the teddy then and he also liked mini cars. There is another Animated episode where Mr Bean discovers a UFO full of people who look just like him and they each have their own individual stuffed toy.
Dan23