Analog robot
An analog robot is a type of robot which uses analog circuitry to go toward a simple goal such as finding more light or responding to sound. The first real analog robot was invented in the 1940s by William Grey Walter. The name of these robots were ELSIE and ELMER (Electro Mechanical Robot). The original circuitry was developed using two vacuum tubes and a photocell to search and follow a light. Recently a kind of analog robots was developed by Mark Tilden.
Mechanical toy
One of the first mechanical toys is the flying pigeon by Archytas of Tarentum created 400 years BC.
In 16th Century Leonardo da Vinci created his mechanical lion as a present for king Louis XII. The lion could walk and reveal a cluster of lilies from his chest.
In 1738 Jacques de Vaucanson created a mechanical robot duck that was able to drink and eat.
Pierre Jaquet-Doz created "The Writer, The Draftsman and The Musician" - toys that are still present in the museum of Art and History in Switzerland.