Continuity mistake: When Tony is in the lesson talking about vampires, the blackboard behind the teacher is free of any writing. Then, between shots, '300' is written on the blackboard, even though the teacher didn't write it.
Continuity mistake: When Tony puts Rudolph into the chest at the end of his bed, he climbs into bed with his red tee-shirt on. In the next shot, his red tee-shirt is neatly folded up, and is sitting on the chest, and Tony has now got a pajama top on.
Continuity mistake: Right before Anna comes into Tony's bedroom (when she teaches him to whistle), Tony is sitting on his bed wearing a sweatshirt and jeans. When Tony hears the approaching footsteps he dives under the covers, and he is wearing his nightshirt.
Continuity mistake: In the scene where Tony first meets Rudolph. Tony has his fake vampire teeth in and is pretending to bite his teddy-bear. He uses tomato sauce to simulate blood and has it all over his face. He uses his left sleeve to wipe his face completely clean, yet for the rest of the scene the tomato sauce keeps appearing and disappearing and changing shape.
