What did you routinely fall asleep listening to as a kid and what does it for you now?

As a kid I usually listened to CDs from the series "Was ist Was". Originally it's a science book series for about 10-15 year old with topics like weather, the sun, mathematics, pirates or vulcanos. The series usually goes pretty in depth for a series more or less aimed at kids.
Apparently it's a translation from the series "How and Why Wonder Books".
For anyone interested: https://de.m.wikipedia.org/wiki/Was_ist_was

Anyway, I enjoyed listening to the audio versions of the books (they were moderated by characters).

Later on I just listened to general music.

Nowadays I do not listen to anything. Sometimes to self recorded sea noises from vacation.
I uploaded them as well :)
-> https://on.soundcloud.com/RD6PW