In the following instructable i will show you how to make the worlds great pencil launcher by making a cross between https://www.instructables.com/id/EAXJ1GZCIFETVPJTTF/
First you will need to gather the following:
1 ballon (3 for insurance if it brakes)
1 thin pencil/pen
and 1 pull apart pen with a decent size hollow tube(you may use any hollow tube/ what ever works for you.)
Step 1: Insert Pen Tube Into Ballon
Step 2: Final Step
You May want to tie a rubber band around the ballon to fully attach it but i couldnt find one.
feed back would cool especially if good!