I got this idea from MrGear on youtube (here's the link to his channel, he's awesome)
THIS IS NOT MY FAULT IF ANYONE GETS HIT IN THE EYE. DO NOT AIM AT FACE!!!!!!
Step 1: Required Components
For this project, you will need:
and a jar lid
A glue gun is used to glue it all together
Step 2: The Peg
Get your lid and peg and glue the bottom half of the peg on to the lid with your glue gun.
Step 3: Cutting the Straw
Now, cut your straw to 6cm
Step 4: THE COMPLETED MODEL!
For some lids, they have a small lip on them. This may affect the straw's angle. To solve this, glue some toothpicks in front of the peg. Now glue your straw in front of the peg and on top of the toothpicks. When the glue is dry, insert your toothpick into the straw, pull back the peg and shoot. HAVE FUN!!!
This instructable is dedicated to my mate Tony who told me about this site.