Continuity mistake: When Pavel picks up the tire from the outhouse, it is a thin tyre with vertical lines, when Bruno is swinging on the tyre a few shots later, it is a thick tyre with lines both vertical and horizontal.
Continuity mistake: When Bruno is caught going into the front yard, he closes the gate. Camera cuts and it is open again. (00:48:10)
Continuity mistake: The landscape surrounding the prison camp changes from overgrown bushes to open plan. (00:39:10)
Continuity mistake: Bruno cuts his knee quite badly. However, the mark disappears in the following shots.
Continuity mistake: When Bruno is playing in the courtyard, we see an officer with a dog stood in the centre of the gate. Camera cuts and he is now stood to the left of the gate. (00:19:30)
Continuity mistake: When the children are shown the new home, the girl's face is one of joy. She's smiling a nice big smile that is hard to miss. In the next shot it is one of shock and has completely changed. (00:11:10)
Answer: Samuel knew the dangers of the camp and knew that trying to escape would result in death. He knows Bruno is likely to be allowed IN to the camp as he is a German and Germans are running the camp. Plus, if Shmuel did escape, where would he go? He's 8, on his own and alone in the woods.