Inside the Children's Book:
From the Main Menu, access the 'Bonus Features' option. Highlight the 'Deleted Scenes' opton and press RIGHT to highlight the 'A Struggle At The Devils Throat' option. Now, press UP. You should have revealed a "red line" above the 'Deleted Scenes' option. Select it to take a look inside the children's book.

Hidden Extra Photos:
From the Main Menu highlight the 'Play' option and press LEFT. This will put a red circle around a "Polaroid picture." Select it to reveal additional photos!