Cover for extruder and blower fan:
Extruder cover eyes rotate :) Looks funny hue hue.
For the blower fan just add two color changes. For the Extruder cover add a single color change and later on a pause to insert a magnet. Magnet should have a slightly smaller radios than 0.65 cm, and be below 1.1 cm in height
The author hasn't provided the model origin yet.