-prepare a strip of paper about 2 x 25 cm (3/4 x 10 in) e.g. by cutting along the edge of a sheet of writing paper.
1. Curl the paper slightly by running it between the thumb and fore finger of one hand, and then wind it tightly into a spiral. Let the edges of the strip overlap by just a few millimeters(not more than 1/8 of an inch) all the way along its length. Stand the completed spiral on a flat surface, holding it between thumb and finger with the narrow end down.
2. Press it down into a coil(you should be able to feel the tension this creates). Let the coil go.
3. The paper should spring into the air reaching a height two or three
times greater than its own length. This coiled spring exemplifies the simplest type of action model - one in which the natural elastic force of the paper is directly exploited, i.e y pinching or pressing it to create a counter movement. Models such as jumping frogs operate on this principle, although they are more complex in construction.
Tags:origami, art, paper art, children's art, how to make a coild spring
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