This is my kind of popcorn machine.
Hope you can see what I see in the drawing:
The little caretaker is adding lots and lots of butter.
The round wheel, on the large rectangular container, is turning (with a slight squeak) and providing electricity for the light bulb. It is similar to something used for light many moons ago.
I hear the popcorn ping against the thin steel metal. The room is toasty and warm. There's an aroma of warm popcorn.