We've recently added a time of corporate prayer in our family devotions. My wife and I have been encouraging our children to pray over specific prayer topics.
As we were praying as a family, our youngest son (4 years old) kept shouting "Amen!"
At first, I was so proud of the little guy because I thought he was participating in his own way in the family prayer time. But as the prayer time went on, it became apparent why he was shouting "Amen!"
He was telling us that prayer time was over!
He's figured out that "Amen" is what you say to end the prayer and that was his cue to tell everyone that we've prayed enough. As the prayer time dragged on longer than he thought necessary, he kept shouting louder, "amen", "Amen!", "AMEN!"
Thank God for kids!