It is time to just do something. There is plenty of advice and tutorials online and in print form, but eventually the time comes to make decisions and try it first-hand.
For this first automaton, I am going with the three painted chicks all at one time where one spins and drops, one will be pecking the ground - up, down, up, down - like an oil derrick, and the third one jiggles like an excited puppy.
The spinning chick will need its supporting rod (inserted into the belly of the body) connected to a flat, horizontal disk that rotates as a vertical round underneath catches it so it turns. This can be done with toothed gears, or perhaps a rubberband on the edge of the vertical disk that makes enough friction against the horizontal disk to move it. That is still to be put through some experiments before deciding what to do.
The oil derrick gif illustrates how the pecking chick will work. Using an egg gear with an offset center. Each time the gear is turned, there is a long and short side of the gear which makes the connecting rod lengthen or shorten its journey up and down.
The jumpy, jiggly chick is also connected to a rod at its belly, but the rod will be bouncing along a sawtooth gear so that when the rod drops sharply over the edge of a tooth, the chick will fall. This should give the appearance of the chick jumping up and down.
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