The Cow Jump paper animation kit is based around a scotch yoke mechanism. Turn the handle and the rotary motion of the crank is turned into up and down motion in the vertical shaft. In the Cow Jump model the legs are connected to the box top so that they lift up and body moves.
The scotch yoke mechanism can be used as the starting point for all sorts of interesting projects. For example, check out the Clockwork Orange and the Goose Project below or search the website for other scotch yoke based models.
If you want to create your own scotch yoke based project why not start off with the Scotch Yoke Essential Mechanism and work from there?!

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Clockwork Orange	Scotch Yoke Mechanism	Goose Project