I am serious. The only way we know is that the parents split up the kids. The boys go one way and the girls go the other. I "think" the last time, the youngest son went with the mom too.
Freaked me out when I saw them and I asked if they'd like to go to a shorter lane. They said "No, we're all together." and I got a REALLY weird look from them...I mean my gosh, sorry I'd never seen their show! lol