It's good to teach people to swim.
Charles takes his son Jack to the beach to swim but Jack does not know how to swim.
Charles wants to react to Jack's inability to swim.
Charles demonstrates to Jack how to do free-style swim and asks him to try to do it.
Charles asks Jack to wear a life jacket to keep him safe.
Jack feels interested and is able to swim several strokes after practicing for an hour.
Jack does not have fun being stuck inside a life jacket.