umbrella term no relation transformation
A pop-up book is any book with three-dimensional pages, often with features that "pop up" as the page is turned.
The terminology serves as an umbrella term for movable book, pop-ups, tunnel books, transformations, volvelles, flaps, pull-tabs, pop-outs, pull-downs, and other features each performing in a different manner. Three-dimensional greeting cards use the same principles.
no relation