These are brilliant works, very much in the same line as the works of Tim Hunkin (a personal hero of mine).
… he started researching kinetics and developed his own system for animating wood-carved figures with the turn of a crank. One of the results was a small body of work featuring important modern artists acting out some of their more eccentric or unfavorable characteristics. In “Picasso and Barbie,” the famously promiscuous Spaniard paints a portrait from a model, in this case a scantily clad blond doll in a suggestive pose. A crank on the piece powers a network of exposed gears that move the artist’s arm up and down, as if painting, and turn his head back and forth from the model to the canvas.