It won't go away, and no one else can see it, so Robert has to walk around with a frog on his head. When he learns that the frog just wants to ""try a boy's life for a while,"" Robert strikes a bargain: If the frog will leave in two weeks, Robert will spend that time doing everything he would normally do in a year. But the end of Robert's exhausting two weeks only reveals that frogs have no honor: ""'But you promised,' cried Robert. 'I had my flippers crossed,' lied the frog."" Then Robert discovers that his little sister can also see the frog, and she suggests a solution: act like a frog for two weeks and the frog will leave from sheer boredom. Robert's activities during his first whirlwind two weeks and his second froggy fortnight afford some mild amusement, but in the main the regulation absurdity of the situation is prosaically developed.