The kids haven't learned much about willingness and cheerfulness. How we do what we do may be more important than the very doing of it. That's an important lesson to teach children. But they will learn it best by observing it in us. We can stow our words if we are not going to model them before our children, because they will copy what they see far more readily than they will follow the instruction they hear.
Actions speak louder than words.
There is another form of nonverbal communication we should mention, particularly when talking about teaching children, and that is touching. We want our children to know we love them, but words alone will not convince them. They need to be tenderly touched. Infants who have been deprived of physical contact have actually died as a result. Children who have had no tender caressing have become deeply disturbed.