This thing is one of the coolest things I've come up with. Holds an arduino with breadboard. Has 2 drawers that you can store resistors / caps etc etc.
When the breadboard and drawer are gone, arduino with shield can be stored. Lid protects whatever you have already setup on the proto-board.
I use a m3 allen wrench to hold it together when traveling around with it. Optional PLA "Spike" (See version 2 video on how to make a PLA spike)
There are now two versions
Version 1
http://www.youtube.com/watch?v=kgz2TJHEeOQ&feature=youtu.be
Version 2
http://www.youtube.com/watch?v=hA5m9EN-Muo&feature=youtu.be
Caja diseñada en 3D lista para imprimir. Se ajusta perfectamente a la protoboard y a Arduino, ten todo ordenado.