35: Percent faster that toddlers fell asleep in nurseries when classical music was played in a study
19: Percent faster for preschoolers
25,000,000: Fine, in $US, Amazon was hit with for the Alexa voice assistant reportedly violating child privacy
Sources: sleep (npr.org — thanks, Rich Pettus!), Alexa: (boston.com). And yes, “classical music” is a broad term. Presumably they weren’t playing Rachmaninoff.