Continuity mistake: At the beginning of the movie, you see that the baby Matilda's eyes are brown, but they change colour to blue when she's in the car.
Suggested correction: It was just the lighting. The sun was shining through the window in the morning.
Revealing mistake: When Matilda telepathically makes the TV explode, you can see what looks like parts of an explosive hidden behind the screen.
Suggested correction: Clearly no sign of it.
Suggested correction: When the TV set explodes, it's a close-up of the screen and no device is seen. When it changes to a wider shot of the actual explosion, the glass breaks and some components of the TV set are shown. There is no way to distinguish between what is a component and what is, as you say, an explosive.
Suggested correction: There is no view of the explosive.
