I make these shooters with an after school club every year. I've looked all over the Internet for simplified instructions so that students can quickly gather materials needed and build the shooters independently. After not finding exactly what I needed, I decided to create my own.
This is a great activity to use when studying air pressure, matter, force and motion, etc. It's also fun to do with Scout groups, youth groups, birthday parties, after school clubs, etc.
The kids LOVE it!!!