Answer:
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
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 falls down but never gets hurt?
Split me in half, and you get me and another me. What word am I?
The most fabulous way to locate pots of gold
I am a room that has a roof but no walls. What am I?