Here is another trippy toy from Sirius Enigmas: the PhoTOP is a phosphorescent spinning toy. It consists of a flat disk with a two part aluminum spindle. The disk measures 12cm. Simply give it a spin and shine a UV/deep purple 405nm laser pointer at it to see the effect.
The PhoTOP was invented by Kenneth Brecher, Professor of Astronomy and Physics, Emeritus at Boston university. You can get it on Etsy.