Nick with his father went to see his grandmother.In the train Nick every minute put his head out of the window.His father said，"Nick，keep quiet！Don't put your head out of the window！"
Then his father took Nick's cap quietly，hid it behind his back and said，"You see your cap has flown."Nick was afraid.He began to cry.He wanted to have his cap back.
His father said，"Well，whistle（吹口哨）three times.Perhaps，your cap will come back by wind，"Nick came up to the window and whistled.Nick's father put quickly the cap on Nick's head
"Oh！it was wonderful！"Nick laughed.He was pleased.He took his father's cap quickly and threw it out of the window."Now it's your turn to whistle，I'd like to see how wind brings your cap back.Dad！"he said gaily（快乐地）