Too often, children forget they have an audience. They talk to each other instead of to the audience. They turn their backs and the audience can't see important gestures or props. Generally. questions like these are better than directions because they make the performers think about their actions and the reasons for them. Be prepared for the unexpected.
Children are unpredictable.
They love to ad lib. You really have to keep your ears open to hear what they're saying. And he's right. Here's a case in point. As the innkeeper, the boy had only one line in the nativity play.