Enough Hishtadlus?

It's the first day at school at Eitz Chaim Hebrew School and as soon as the first class begins, the teacher Mrs. Rosenberg tells everyone, "Listen children. If at any time during the lesson any one of you needs to go to the bathroom, all you have to do is to hold up two fingers."

After a few moments of thinking about what he's just heard, little Moishie Epstein, "Mrs. Rosenberg, how will that help?"