Answer:
Lots of them make up a word, And lots of words are in them. It's easy when you think about it. A while ago we stamped and mailed them.
You could do this to a motion, see it on a watch, or place this in a race.
What should you do when you see a green man?
I occur twice in eternity. And I'm always within sight.
I can be found in seconds, minutes and centuries, but not in days, years or decades.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?