A personalised launchpad for model rockets. One of the legs is adjustable for uneven surfaces (although I think I read once you are more likely to get a table level by rotating it)

Made as a Christmas present, http://msraynsford.blogspot.com/2012/01/laser-cut-rocket-launcher.html

I used a length of piano wire as a guide for the rocket and the lid from a tin of beans as a blast shield to stop the whole thing from catching on fire.