This Arduino holder kit makes it easy to create prototypes that aren't tethered to a computer or wall power supply. Its got space for a 400 point breadboard and your choice of either a 9-volt or AA/AAA battery pack. Kit comes with mounting hardware for your Arduino (three M3x16 bolts, three nylon spacers, three M3 nuts), 9V to barrel plug adapter (works with 9V batteries and snap connector battery packs), 1/2" wide Velcro strap, and rubber feet.

Just add in a standard Arduino, a 9V battery or snap connector battery pack, and a 400 point breadboard and you'll have everything you need to make battery powered Arduino projects quickly and easily.

Available in black or clear 3mm acrylic.

Grab the design files for this here:
http://www.thingiverse.com/thing:14559