At universal it works for pretty much any kid who doesn't want to ride.It is not like Disney where they give Rider Switch passes.At Universal, the whole party goes thru the line .Before boarding there is a Child Swap waiting room ,where one person waits with the kid not riding .In the room there is usually movies or cartoons playing.For example, At Harry Potter Forbidden journey there is Harry Potter movies playing, Revenge of the mummy has the Mummy cartoon playing etc.