Thanks go to Rob for introducing me to Fantastic Contraption. Now my free time is spent working on physics projects in a Flash game.
Here are my successes, and some failures:
http://FantasticContraption.com/?designId=357978
http://FantasticContraption.com/?designId=358643
http://FantasticContraption.com/?designId=358880
http://FantasticContraption.com/?designId=358931
http://FantasticContraption.com/?designId=360580
http://FantasticContraption.com/?designId=360794
http://FantasticContraption.com/?designId=360846
http://FantasticContraption.com/?designId=360954
http://FantasticContraption.com/?designId=360982