I was looking for something simple to build with my daughter, and couldn't find what I wanted. I got Idea from youtube, but didn't have wooden sticks, so I did what any father with 3d printer did :)

Model had a lot of tolerances, except gears, but they can be up sized 1 or 2%. Motor body needs supports, but beauty and precision is not vital for performance.

Material bill:

1x Motor with 2 shafts - standard found everywhere (I have included image)

2x  M2.5 screws for top. Top can be glued, but for repair-ability i suggest screws. I drilled mine by hand, I have updated model

1x M3 or M2.5 screw and nut to hold motor

1x Battery or some other power supply from 5-6 to 10V. I have used 9V battery

2x rubber band

Assembly instructions: You will figure it out. Look out for gears and rods to be on same side. screw that holds motor goes down, and rod - teeth segment goes to back… Assemble it, the glue rods to legs.

I share model freely. If you want some modifications, and don't know how to edit model, contact me, it is not a problem.

Good fun building it.