I've just  uploaded a sample project from the Cardboard Engineering Source Book. You can download it for free on the Source Book page. The sample project features the crank slider mechanism. It comes with an automata character or you can complete it with your own character. There's also page of ideas for extending the project and the contents list for the full book. The full Cardboard Engineering Source Book contains nine more projects as well information about design and mechanisms.
I hope you enjoy it!