Bob,a boy of three years old,went to see his grandmother with his father.In the train,he often put his head out of the window.His father was worried and said,"Bob,don't put your head out of the window!"But Bob didn't listen to his father and went on putting his head out of the window.
Then his father took off Bob's cap quietly,hid it behind his back and said,"You see,your cap has flown away."Bob began to cry.
His father said,"Well,go to the window,whistle at once!Perhaps your cap will come back."Bob came up to the window and whistled.His father quickly put the cap back on Bob's head.
Oh!It was wonderful!Bob was pleased and laughed.He quickly took his father's cap and threw it out of the window."Now,it's your turn to whistle,Daddy!"