Im pretty good at workig with office supplies, I would go so far as to call myself a office supply ninja, and im good at thinking through mechcanical devices too. (not such a good speller though, for all those grammar nazis out there if you see something wrong... just comment down bellow I'll fix it... actually please do) and I get kinda bored in school...anyway here is a new design for a catapult. (BTW sorry about some of the poor quality my normal camera isn't playing nice)

Heres what your gonna need:
- 2 paper clips
-paper square( depending on size you can just use Sticky notes)
-tape
-pliers or strong thumbs

Step 1: Bending the Paperclips Tp the Right Shape

There are alot of steps too this and it may get confusing... if you have any questions just post them bellow and ill get to them as soon as I can

Straitin out one of the paper clips compleatly, then forget about it for a while
Take on whole paper clip unchanged and bend it too the next set of photos and follow them as best as you can and fiddle withh it a bit to get it how you want it.
get the peice you forgot about and follow the pictures.

Step 2: Putting the Two Components Together

Twist the two components together so it kinda looks like a spring.

Step 3: Makeing the Pouch

People who have done oragami will have an easier time doing it the way i have here, or you can just improvise it.

Step 4: Tapeing It Together

Get two or three peices of tape ready and look at the pictures

Step 5: Ammo & Firing

put one of your fingers at the top of the pouch pull it back, make sure that the tension bar is hitting... aim and fire... have fun and be safe... no shooting people in the eyes.