So here is my issue, I have an Echo device at home that my kids use quite a lot. When I am at the gym I also play spotifiy. Now when my kids start a song at home I cant hear music in the gym anymore. Would a family plan allow me to stream on multiple devices? Also I would like to create a playlist for my kids but not on my account. They are to young to use a computer yet so I would like to switch between their and my account quickly to create playlists. Is that possible?