Interesting sleep stories?

Hello,

I'm doing some research into ways in which parents get their babies to sleep and how this may vary from culture to culture around the world. Some of the more unusual things I've come across are using different pieces of music, using repetitive noises from hairdryers and hoovers and movement like bouncing on balls and driving in the car.

Just wondering if anyone had come across any interesting stories/tips or anything that they've found works/worked on their own children?

Thanks,

Kieran