I like trains! And also all kind of electronics and low-level programming stuff...
I made this shelf from a pice of wood and some 3D printed rails, using butter boxes as drawers.
Use $5 worth of hardware store metal to mount your HD monitor on the wall. Configurable pitch and rotation.
I glued a custom Portal-style cover to my 3D printing hairspray can to make it look cooler.
Use this simple soldering iron made from a nail and a piece of wood to solder thick wires or weld plastic.