How do we learn fairytales and nursery rhymes?

I have no recollection of being taught any fairytale or nursery rhyme, but I obviously had to have learned them somewhere. Do we tend to learn them from our parents? I don’t think they are taught in schools. Do children still learn them in the age of the Internet? There are also songs that I remember girls using when they played jump rope. Do they still do that? How did they learn the songs. Is it possible that there is a children’s culture that gets passed from older children to younger ones?