Harlequinades or pantomime books, in which each lifted flap changes the picture or reveals a new twist in the plot, are a form of flap mechanism. Flaps may be cut into the shape of the illustration.
From the post:
. . . often
Harlequinades featured the adventures of a clown or harlequin and were often written
to teach a moral.
A great example of a harlequinade was this new acquisition featured on our companion blog to the exhibition, Fold, Pull, Pop & Turn, The Falshood of External Appearances, printed in England, ca. 1790.
If you are in Washington, D.C., be sure to check out this wonderful show that includes harlequinades, pop-ups, and other examples of paper engineering. It will be on display at the National Museum of American History through September 1, 2011.