This article describes the construction and operation of a totally enclosed motion room capable of carrying four students. The room is used for studying motion in a rotating frame. The rotation rate can be varied from 0 to above 20 rpm. Unique features of this motion room are the 60‐in. searchlight frame used for the mount and electrical connections and the two cattle watering troughs used for the motion room proper. The room, built a number of years ago, has not previously been described in the literature.