As children, we perceive everything as new. Fresh. Without preconceived ideas or notions. Making a splash in the water can be the the most fun thing in the world! Doing it this way makes a big splash! Doing it that way makes a loud one! Children, especially infants, are enthralled by novelty. As we grow older, the novelty of experience wears off and we're more likely to take our lives too seriously to enjoy such simple pleasures. We fear that it would make us look childish.