Load an oil wheel in to the side of the Space Projector. Use the focus ring on the projector to focus the image on the desired wall/celing. The oil wheel turns within the projector creating a continuously spinning oil/lava effect on the wall/ceiling.

See more images Mathmos Silver Space Projector - Blue/Red Oil Wheel : Here

Mathmos Silver Space Projector - Blue/Red Oil Wheel

Mathmos Silver Space Projector - Blue/Red Oil Wheel