Fun

Take a helium-filled balloon, and tie a long string to it. Carry the balloon out into the open (make sure it isn't raining or it'll be dangerous, but even more fun). Let the balloon go, and as the end of the string floats just above your reach, jump and catch it. Repeat. The adrenaline rush is one of the best feelings you can get, all from just a balloon and some string. One mistake and the balloon will fly away into the clouds, never to return. Dont make the mistake.

When was the last time you let your inner child take over? One of the problems of growing up is that we leave our child-like attributes behind. And that is a loss that no one notices.