Continuity mistake: When Meg comes up to Angela, taunting her, Angela's head position and the look on her face changes in each shot.
Continuity mistake: The green wood chair the chef uses to check the boiling water for the corn changes position.
Continuity mistake: During the fight between the boys in the rec hall, the cowboy hat on the floor repeatedly changes location between shots.
Continuity mistake: During the baseball game, Ricky runs for home and slides into it. His hat flies off and he leaves without it, but at the bleachers he has it on.
Answer: Watch his first scene at his aunt's. He doesn't speak at all. Clearly Angela/Peter has had a withdrawn personality since the death of his father and older sister. So doing activities with other kids is one thing he wouldn't do, as for eating, a lot of kids don't at first if they miss home.
Rob245