I found one of these several months ago, and will buy others if I find them as I think they're excellent. It is a "Trovascope"-- designed by artist Ernest Trova (1927-2009) for the Museum of Modern Art in 1974. I think more artists should design kaleidoscopes, but Trova was especially well suited to creating a very graphically satisfying one, with his "falling man" silhouettes lending themselves to all sorts of interesting kaleidoscopic permutations! With an array of other smaller shapes in primary colors, including letters and arrows, mixed in too. What's great here is that it does what the best kaleidoscopes should--produce a very expansive array of effects, continually good as one morphs into the next, and then just shake it to create a whole different sort of starting point. And the exterior is pretty terrific too.

8 11/16" t x 2 1/4" d widest and in very good condition wear, some minor spots and just a little fading/toning to the blue paper around the turning end.