This site allows users to “play” with virtual reproductions of rare items that are too fragile to allow frequent use of the originals. The items are represented as interactive lift-the-flap books that can be manipulated in the same manner as the originals.
Metamorphic pictures are made on a long sheet of paper that is folded twice horizontally so that the top and bottom meet in the middle and create two flaps, and then folded and cut vertically to create a number of panels. Lifting the top flap and then lowering the bottom flap creates three different scenes for each panel.
*The Virtual Movable Books site requires the use of the Unity Web Player. Instructions for downloading the plugin are provided with the Virtual Movable Book App at the link above.