Automata

Automata or automatons are mechanical objects that are relatively self-operating after they have been set in motion. In general, automatons are designed to arouse interest through their visual appeal and then to inspire surprise and awe through the apparent magic of their seemingly spontaneous movement. 
Swiss watchmaker Jaquet-Droz created three of the world’s most famous automata. The most famous of these is The Writer, a clockwork child made of around 6000 parts.