Most certainly not! There are many youngsters that enjoy the hobby. It can be enjoyable an relaxing at all ages.
Since stamps first came out in 1850.
You could save them and collect them.
Depends on what you define as "Old". Someone in their 30's is "Old" to someone that is 5! Generally the term "Died of old age" is for someone that is very old such as 90's or even in 100's. Also you...
well it depends on the persons physical condition, and even mental condition.
It depends on the person's physical and mental status whether or not they are really old.