Video explanation
The film character Bujji appears as a spherical head turning and tilting in a support, with glowing blue eyes. The focus is shape and joint motion.
Joints constrain motion
Side pivots allow the head to tilt relative to its support, while the base adds another rotational direction.
Model parts separately
Separating the shell, support and base makes their relative rotations easier to control.
Design versus engineering
Glow and motion add character, but the image does not establish working motors, sensors or control algorithms.