During the scene when Maria is kneeling by her bed saying her prayers about the children, watch the open window behind her. As she is saying them Leisel sneaks into the bedroom through the window. You can clearly see her quickly run up to the window from one side, and then climb through. Then Maria finishes her prayers by saying she hopes Leisel will trust her and tell her where she has been and stuff. She then walks to the window, and looks down saying something along the lines of "You climbed all the way up here". And Leisel says "Yes. Louisa can do it with a whole jar of spiders". I would certainly like to know how she managed to run up to the window, when the ground was so far below. Unless she somehow learned how to fly, then I think this is a pretty big mess up.