Build a PVC Catapult

Here is a great video from Make Magazine and Weekend Projects where they make a catapult out of PVC piping. They followed a project in the book: The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery

PVC is a type of plastic piping that is used in the building industry for plumbing. It is inexpensive and easy to use but you do have know a little bit about how to use it and how to assemble pieces together. You can get PVC and all the ancillary supplies for it at any hardware or home improvement store.