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.
What is the center of gravity?
What starts with a T ends with a T and is full of T?
What word is always pronounced wrong?
What age most travelers have?
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?