Walking Toy Robot

This is another walking robot toy design. It's a little different from the pin walkers I've posted before. It has legs that bend at the knees to give a more realistic walking motion. The ideal behind it was to turn the pin walker mechanism inside out. On the other pin walkers I've built the pin is inside the stationary leg. It moves in an elliptical motion to drive the toy forward. In this design, the pin is stationary and the leg moves in the elliptical motion. The outside facade of the leg is made of the upper_leg that pivots at the top and the lower_leg that connects to the foot of the leg. The two pieces are connected at the knee. The leg moving up and down causes the knee to bend. This is purely astetic. I'm sure the mechanism is nothing new. It also has swinging arms for a little added animation. There are pins on the top_leg parts that mate to slots in the arms so they swing opposite the legs. The toy has a minimalist look. It can be printed and built in a day. The hardest part