Mechanical Walking Robot Toy

I've been inspired and educated by Robothuts walking toys so I thought I would try to design one. This is a pin walker type design. I was trying for something small and simple so I designed it around a 6 Volt N20 gearmotor and two 2032 coin cells. The robot is approximately 110 MM tall and 70 MM wide and 40 MM deep(4.5" X 2.75" X 1.5"). The two 2032 coin cells are in the head along with 2 leds. I also wanted to try designing my own switch into the battery holder. The switch contact is made from a #1 paperclip. Make sure the #1 paperclip you choose will take solder. Since the shape of the contact is important I've included a jig for bending it. It walks pretty well with no tendacy to fall over. The arms are driven by the pins in the legs so they swing while its walking. I've seen that in a couple of Robothuts designs.

This walking mechanism is a pin in each leg driven up, down, back, and forth by a crank. This requires a crank and pin for each leg.The cranks are 180 degrees from each