Here is what Ken says about this catapult:
"I built it out of 11 pieces of paper, a seperate paper cone, and a rubber band. That's all, and it really fires! "
So, Roll up eleven sheets of paper nice and tight. And tape two of them together to make the throw arm of the catapult. Then tape the pieces together as shown in the pictures. After that you tape on your rubber band, make a cone and add that on!




New Project: How to make a Mouse trap Catapult in about 1 minute. You don't need much and this thing is really powerful. You can probably fire small projectiles about 40 feet. How to make a Mouse Trap catapult

Mini Weapons of Mass Destruction: Build Implements of Spitball Warfare
PopularMechanics.com selection for one of The Best DIY and Home Improvement Books of 2009
We’ve come a long way from the Peashooter Era: with the advent of modern household products and office supplies—binder clips, clothespins, rubber bands, ballpoint pens, toothpicks, paper clips, plastic utensils, and (of course) matches and barbeque lighters—troublemakers of all stripes have the components needed to build an impressive, if somewhat miniaturized, arsenal.
Toy designer John Austin provides detailed, step-by-step instructions for each project, including materials and ammo lists, clear diagrams, and construction tips, for mayhem-loving MacGyvers. The 35 devices include catapults, slingshots, minibombs, darts, and combustion shooters. Build a tiny trebuchet from paper clips and a D-cell battery. Wrap a penny in a string of paper caps to create a surprisingly impressive “bomb.” Several of the projects even include variations where combatants mount laser pointer sights to their shooters to increase their accuracy.
Finally, once you’ve built your armory, the author provides plans for a Top Secret Concealing Book to hide your stash, as well as targets for shooting practice. Never let your personal space go undefended again!

Whoosh Boom Splat: The Garage Warrior's Guide to Building Projectile Shooters
