Rubber band skipping, iron ring pushing, hopscotch, playing marbles...Those classic games accompanied generations of Chinese people in their childhood. Children nowadays have more and more expensive toys. However, most of them have to stay indoors and the various electronic devices have taken up most of their game time. Playing games were collective and outdoor activities in the good old days. Many parents and teachers now try to help children experience the old games, hoping they can go outdoors and grow up in a more healthy way.