A Super Simple K'Nex Catapult

I have been reading & building stuff off instructables for a while now. I thought it was time to contribute.

Here is my first instructable: a simple but effective catapult. it fires about 2 feet, but shoots it really high.

it uses marbles, but small sinkers work as well.

Ready to build: continue to step 1.

Below is a list of parts. Gather them now.

Build two of the below pictures.

Then, join them together. see last pic.

This is a little hard to explain, but here goes.

First, set it up as shown in the first two pictures.

Then, wind a turn on until you see picture 3.

I don't know what to call it, but you've got to build the arm that holds ammo and fires it.

If you know what it's called, comment & tell me.

Join the catapult ammo arm as shown in pic one.

Then, Add stabilizing rods.

Please comment highly, and nicely, on this.

First time!

Enjoy the catapult and win your office territory back.