The Monochron Clock Kit, from the Maker Shed, is a completely hackable, open source clock kit that has a funky retro feel. The ATmega328 processor comes pre-programmed with a “Retro Arcade Table Tennis for Two” face but includes the Arduino bootloader making it easy to program your own custom look. The kit comes complete with all electronics (soldering required), laser cut case, and power plug. Check out the Make: Projects to see how fun it is to build! Also, still not following the Deal of the Day RSS or Twitter? It could save you some money!