Dear TNK, It is human being. He/She crawls as a child, walks as grown up (noon) and uses a stick to walk in the evening (when they get older). Viswa
viswa is correct Man (or woman). Crawls on all fours as a baby, walks on two legs as an adult and uses two legs and a cane when they're old.
What always runs but never walks, often murmurs, never talks, has a bed but never sleeps, has a mouth but never eats?
RIVER runs but never walks, often murmurs, never talks, has a bed but never sleeps, has a mouth but never eats.