Usborne Book of Pop-ups by Ray Gibson
This volume of the How to Make series describes all kinds of pop-up techniques to use in making cards and other pop-up projects. All the main kinds of basic pop-up mechanisms are described in step-by-step detail. Thee are projects simple enough to do in a few minutes, as well as how to make a complete pop-up book. The steps are illustrated and there are photographs of the end results and variations to try.