Here is my little buddy Chompu Chan as a wind up walker. It uses the walking mechanism that you can buy at MakerBot Industries.

This thing was made with Tinkercad. Edit it online https://tinkercad.com/things/j55KzXLAb9Y

I printed him on my Printrbot with 40% infill and 2 Perimeters. I am sure that if your printer is better calibrated than mine, you can make one with less infill and possibly less perimeters… let me know if you do!

After he was done, my lovely wife took her nail polish to him and gave him his cool paintjob.