The colorful Kalidascope Bolt-On Large Acrylic Bird Toy attaches to the side of your bird's cage. It has 2 large plastic rings on it and the toy itself can spin making a noise. Filled with beads and other shapes and with the mirrored back, it is interesting and fun to watch your bird at play. When spun the back reflects all the colors of the rainbow. A great large bird toy and the picture does not do justice to this toy. It measures 6 1/2" across and comes out from the cage 4".