A lot of times during the trips, the buses would be late picking us up. This usually resulted in us having to keep the kids settled for a period of time, which was less stress-inducing than keeping them together in the building, oddly enough.
I can't remember offhand if taking the kids to the bathroom was a used time-killing method for trips, but given how long it takes them, it might as well have been.
If my boss ever sees this strip, I don't think she'll be happy with how I drew her here.