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More than nine million American children are part of their summer at a camp. They are swimming, playing sports, making music or to use a computer. Traditional American summer camps children a chance to play many sports outdoors. These camps may be in the mountains, in the woods or in a lake. Other camps have like painting, music or computer programming. Children at all kinds of camps meet new friends, learn new and develop independence（自立）.
Some children go to camp during the day and home at night. Others stay at camps all day and all night. Most children who camps are between six and sixteen.
Some children stay at an overnight camp for one or two weeks. stay at a day camp for about eight weeks. Parents from one hundred to more than seven hundred dollars a week for overnight camps. Day camps are much cheaper. The American tradition of children to summer camps began more than one hundred years ago.
