David Sugich is behind some of the coolest kaleidoscopes we have tested. His Novascopes are available in various sizes. They are hand-made, stained glass geodesic sphereoscope kaleidoscopes with loose beads that create beautiful patterns. These work great indoors and outside.
In the above video, we test two 8-inch Novascopes (Mini & Baby Star). These may be small but still put on a show comparable to larger versions.