I love this “cigar box lab” Brian posted on Hackszine. It was built by Raphael Abrams. Raphael explains:
I like to hack on the go. So I made a charming little mini lab out of a cigar box and some electronic parts. It’s got a breadboard, a built-in Arduino, a couple of places to put loose parts and a control panel on one side. The control panel is the best part with LEDs, potentiometers, a switch and a button all mounted on the side of the box. I love it so!