Ask HN: What have you built? (not software related)

I built a side for my POS popup camper. Metal, glue, ants...

House rebuilding after Hurricane Katrina. Link to one of the more epic episodes: http://www.gallerytungsten.com/archives/000145.php

When I was a kid I hacked apart my NES controller. I connected wires to each of the leads, and then made some simple contraptions that would connect two leads when activated. The main one was a jumping board my dad helped me with. I also made a punching thing you strapped to your arm. I didn't know how to solder properly so I don't think it all worked right at any one time, but it was cool.

Still waiting for royalties from the Wii :)

I recently built an arcade cabinet, which houses a PC running MAME so that I can play lots of arcade games.

I also built the desk on which my workstation currently resides. I couldn't find a desk that (a) looked decent and (b) was enormous, so I designed a desk that satisfied both and built it.

Together with friends I renovated a 4-floor house, which was unhabited. Now we have a cool house with garden to live and work in, oil-, coal- and gas-free heating and solar panels for below-the-average rent.