www.EasyToBuildCatapults.com is a site very similar to this one that has reviews on catapult resources. Of course, it is FREE so there is no reason not to check out their content in your spare time. Their site appears to still be under construction, so keep checking back as they add more information on easy to buil catapults and easy to build trebuchets. They plan to launch easy DIY designs that will be for backyard scale trebuchet models and replicas. I wouldn't expect to learn how to make a 40 foot tall catapult, but I would expect to learn about the physics behind the catapult system and how to build easily replicas at home.

Easy to Build Catapults offers honest reviews and we expect will become a great online resource... so check it out!