wheel+and+axle

Wheel and Axle

media type="youtube" key="ndT35aqDfAQ" height="315" width="560" media type="youtube" key="0xiQtmUQ4yI" height="315" width="420"

media type="youtube" key="XlZYPFDjTJM" height="315" width="420"This tank uses wheel and axles to drive. However, that probably won't stop it from falling apart.