In case you didn't know this yet, compressed air is pretty awesome. With simple mechanical systems - pumps - energy can be stored and used for an infinite amount of applications. What I like about compressed air is how simple and accessible it is. Anyone with a bike pump can start moving air to greater pressures. Soda-pop bottles can be turned into air tanks, and by looking a little online and on Instructables, you'll find people who've used compressed air to do everything from shooting water balloons to powering a bicycle.
In this Instructable, I will show how I made a miniature compressed air turbine.
8/16/13: Thank you for the feature!
8/16/13: I'm just shy of 9000 views in barely 12 hours! Thanks everyone!