Let the Apparent period of time = T at age Age
T can be a week or a day or one hour or 1 year.
Given t is inversely proportional to age.
When a 3 year old child accompanies her/his mother (36 yrs) to a market or friends house, the mother spends 5 minutes conversing with her friend. That duration seems to be as long as 1 hour to the child. So the child gets annoyed and bored.