When I was young, I spent hours outside in my back yard and the surrounding countryside. There were plenty of things I could do. I could ride my bike,play football with friends or climb trees. I look at young people nowadays and feel sorry that they spend so much time watching TV or playing computer games.I thing it's time we got back to natuer. The National Park System of the USA has so much to offer us. We can enjoying rivers,lakes,woods and mountains, and we don't have to spend lots of money.
Just remember one thing: Follow the National Park Rules.