Playing.

Losing the ability to play. 

When humans first evolved into their present form, they found themselves in a vicious, nasty world, where eternal vigilence ment the difference between a short life and a long one. Every sense was a cannel of precious information that could save those early human lives. By comparison with this savage world of the past, the modern world, and especially the western world of the child, is very safe. Because of this safety children gradually learn that they do not need to be very vigilent, and they they do not really nead to finely discriminate between various minute changes in their environment. Thus they do not need to pay close attention to their sensory intake unless there is a large obvious change. It follows then, that because children no longer need fine discrimination to survive, most of them tend to gradually lose these incredable abilities in all their senses.

"Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mistakes, and having fun." Mary Lou Cook

"Serious people have few ideas. People with ideas are never serious." Paul Valery