A baby usually wakes up in the wee-wee hours of the morning. A child will not spill on a dirty floor. A young child is a noise with dirt on it. A youth becomes a man when the marks he wants to leave on the world have nothing to do with tires.
Familiarity breeds children.
For adult education, nothing beats children. God invented mothers because he couldn't be everywhere at once. God invented guilt so mothers could be everywhere at once. If you have trouble getting your children's attention, just sit down and look comfortable.