www.DiyCatapults.com is currently offering a prize of $400 for designing a catapult!!! You have to check it out! The site is a great FREE resource that helps educate people about how to build catapults and what materials you will need to buy. Of course, similar to a catapult, the site also has information on trebuchets! History buffs who like to build scale models of historic catapults in addition to science or physics classes looking to build the collest experiment alike will find the site useful. Much like the site you're on, this site is still being developed, but it's worth checking out their contest. The also have catapult videos you might find fun!

DIY Catapults offers a ton of FREE online information, including: