I read from another site that using child swap can double the number of fastpasses you get to use, is that still how it works? The example given was 4 adults and 1 small child. the first 2 adults get a fastpass for a ride and go to the ride. The other 2 adults get a child swap pass and watch the child while the first 2 ride. Once the first 2 get off they trade the child and the second 2 can go right on the ride. This would essentially give a fastpass to 4 adults when only 2 fastpasses were used. Is this how it still works?