Dowel - at least 3 feet
Step 1: Cut Out Your Wood
Cut 2 cams and 2 circles out of your thick wood with the milling machine. You also need to cut 1 circle out of the thin wood. After you have cut everything, drill holes in the thin wood circle and your 2 cams. The size you cut them spends on how large you want to make your automata and how big your box is.
Step 2: Add the Dowel
Run the dowel through your box and slip on the thin circle and the 2 cams like in the picture. Also, add a small square of cardboard around the end of your dowel to stop it from pushing too far through the box. Hot glue everything to the dowel.
Step 3: Drill the Box
Drill holes in either side of your box so that you can run your dowel through to the other side.
Step 4: Add Support.
If your box is too flimsy, you can glue on kitchen skewers to add support. I also cut out the bottom of my box to make it easier to work with.
Step 5: Add the Circles
Hot glue a small portion of the dowel to your circle and rest it on top of the cam. You will also need to glue a strip of cardboard with a t above your cams to keep the dowel upright.
Step 6: Add a Handle
Drill a hole in a tennis ball and slip it on to the end of your dowel to make a handle. Glue it so that it will not slide off.
Step 7: Attaching the Last Dowel
Glue a small dowel to your thin circle. Spin it around to make sure that it doesn't hit the ground. If it is too long and does hit the groun, add stilts to your box like shown in the picture.
Step 9: You're Finished!
Give the ball a spin to see if it works. The first picture should spin around the inner dowel and the second two pictures should move up and down.