Mr.Trapper's children will probably learn to tell the others how is important to use a seat-belts, but they will rarely use them themselves. Children imitate their parents. A model of behavior are learning in family-if parent wants to a child accept some type of behavior, it is very important that he behaves in that way. In this case, Mr.Trapper "ambiguous message" to his children-he talks about importance of something, but he does not behave like that.
