A multiple windmill in which three fan wheels are mounted on a common rotatable frame and are each rotatably linked to a common fixed wheel or gear. The fan wheels are each rotated by the force of the wind and in turn rotate the common frame in which they are mounted. The device may be in the form of a display device such as an ornamental lawn device, with the exterior of each fan blade marked so as to create ornamental patterns when the blades and the frame are rotated by the wind. The common stationary drive wheel serves to rotate all three blades at a common velocity.