Rockets!

Some time this summer, we are going to launch rockets. Some may be old-fashioned gunpowder-powered rockets, but some may be powered by compressed air, which we pump ourselves. I have the issue of [Make][], and there is also this lovely [tutorial on the Make website][tut].

[Make]: http://makezine.com/
[tut]: http://blog.makezine.com/archive/2010/07/how-to-building-the-compressed-air.html