a.) The throne and the palace: 2 servo motors with 1 – 1 LED are mounted and can be moved up and down separately. 4 touch sensors control the two motors to control the whole structure, 2 control the throne, 2 control the palace. In both cases, one moves the figures up and the other down on the rack by stepping, introducing the concept of variable when programming.
b.) The palace and the blue throne are built with a special puzzle-like construction on 6 servo motors. The program starts automatically when the power is turned on.