Build a mini air cannon!

This is one of the 48 projects for our Instructables: Made In Your Mind (IMIYM) exhibition at the Children's Museum of Houston showing from May 26, 2012 - November 4, 2012. Produced in partnership with Instructables, IMIYM is an exhibit where families work together to build different fun, toy-like projects that help construct knowledge and skills related to science, technology, engineering, and mathematics while instilling a “do-it-yourself” attitude in kids so they feel empowered to explore, tinker, and try to make things themselves. To learn more, check out the article here.

For this project, we've taken an Instructable created by someone else and modified it for use in the Museum. This specific project is based on the Paper Cup Air Cannon project by MaddHatter, but there may be others on Instructables that are also similar. Often, we have to change the materials and/or process due to the large number of visitors (we see over 800,000 annually) and the need to ensure safety in a mostly non-facilitated environment. So, yes, many of these projects have room for improvement in both materials and methodology, which is PRECISELY what we want to encourage the kids to do. So please do share your ideas for improvement and modifications!

Step 1: What You Need

We are selective in our materials for cost, ease of use, and safety due to our high traffic (800,000 visitors annually). So, for our purposes, this design worked best. But you may have other ideas - please share!

1 - 16 oz Plastic Cup (soft plastic)
1 - CD
1 - 12” Balloon
Masking Tape
<p>Cool project and easy to follow instruction.. 2Thumbsup</p>
Could I make one on a larger scale?
My dad has a rig similar to this (the grabage can one) that he uses to blow out candles. Very nicely done!
Thanks so much! I'll likely be posting my trashcan and 5 gallon bucket versions. I'm sure others may have already posted so I will take a little search before I post anything so I can try to give credit where credit is due.
I tie a knot in the neck of the balloon and cut a small hole in the other end. Put the hole end on the end of the cup, and then you have the knot to hang on to when you pull on the balloon to shoot the cannon. Thanks for the CD improvement. I do this one for the Webelos Cub Scout Scientist Activity Badge. Thank you.
I like that idea of using the other end. We'll give it a try!
Drop a chunk of dry ice in it and some warm water, then shoot it. Epic smoke rings!
Cool (literally and figuratively) idea! Thanks!
We did it in my applied science class, then later on on a huge scale wit ha garbage can.
I've actually got a trashcan version sitting in my office. I use a little fog machine like they have at party stores around Halloween to fill it and make smoke rings. Great for aiming will playing William Tell with Styrofoam cups...
This is a great, kid-friendly project! Sure, there are other guides for making air cannons, but this one takes into consideration safety AND learning. Awesome work, and now I want to make some for a more monitor-safe version of intra-office warfare.
Thanks so much! Good luck with your battles and keep your eyes out for our remaining projects - some of them may give you a better advantage (trust me on this one - we've been testing these projects in the back offices...)

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