My daughters wanted to try playing the thunderstorm MP3 when they went to bed last night. Sometimes noise from the neighbors bothers them when they are trying to go to sleep. I burned it onto a CD for them to play.
First, the thunder part was a bit alarming to my younger DD but she decided she could deal with it since it wasn't real. I set it to play and left the room but came back in a little bit to listen outside the door to see how they were doing.
I heard the following conversation:
Older DD: "I have to go to the bathroom."
Younger DD: "Why didn't you go before bed?"
Older DD: "I didn't know I had to go until I started to hear all the rain."