Otto Arduino Walking Biped Robot Kit (Requires 3D Printing)
Otto is a walking arduino robot. Just 3D print the free models, assemble him and then watch him waddle around and program new actions.
This kit includes all the mechanical and electronic parts to build the OttoDIY robot.
Here is the link to the free 3D printing files for Otto.
Instructions are included in the Kit but here is an Instructable as well.