We rented a double stroller for the day we went to the Magic Kingdom.  We put the kids in the stroller with nothing to eat, nothing to play with.  All of a sudden, they start fighting.  Mom told me they were fighting over a single drainage hole at the bottom of the stroller.  It was the first thing that made me laugh all day (it had been a long morning and I was crabby).  I thought I wouldn't stop laughing; only my kids could manage to fight over a hole.