update - coming soon, lovely prepackaged kits from oomlout
--No difficult to source parts (no switches, relays, or IC's (everything but the motor is available at Home Depot).
--Has a Mechano for grown-ups feel.
--Choice of options for cutting out pieces (scroll saw & drill, access to a laser cutter, purchasing online from Ponoko).
A quick video of the finished product walking through frame:
( A longer video of it navigating between obstacles can be found on step 7 )
(If you would like any of the files in an editable format they can be found on a parallel Instructable here )
(Coming Soon, an Instructable on how to use a microcontroller (Arduino) to control the robot)
(I have used metric units and components in this Instructable. However those more familiar with imperial units do not despair, replacing the metric component with their nearest imperial counterpart should work (although I have yet to test this)) .