thumb|Kaleidophone on display at Palais de la Découverte in Paris.The kaleidophone is a "philosophical toy" that produces moving optical figures.
thumb|Kaleidophone on display at Palais de la Découverte in Paris.The kaleidophone is a "philosophical toy" that produces moving optical figures.
== History == The kaleidophone was invented by Charles Wheatstone, who published an account of the device in 1827.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).