Keychain Kaleidoscope Silver This beautiful silver kaleidoscope key chain comes with its very own pouch. The kaleidsocope measures 2.6 inches. Look into the view finder of a kaleidoscope, and you will see images that look like constantly changing stained-glass windows. Kaleidoscopes blend physics with art in ways that amaze and delight people of all ages. Some basic facts about kalidoscopes illustrate how they create magic with mirrors.