A novelty illusion device producing an illusion of a shimmering floating bubble having a transparent case, an illusion object disposed within the case, an electric motor for producing rotational force, a power circuit and power source for driving the motor, and a drive shaft for transferring rotational...http://www.google.fr/patents/US5547718?utm_source=gb-gplus-shareBrevet US5547718 - Motorized spinning illusion device
