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.
In the sun it likes to play; In the rain it goes away; Walk or run it always follows; In the mud it always wallows.
The little pink nub that helps rectify mistakes.
I'm the source of all emotion, but I'm caged in a white prison.
What has four fingers and a thumb but is not alive?
Do what he says and you'll be fine, don't and you lose the game.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?