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 time starts and stops with an “n”?
Whipping one of these out in the wrong setting is said to be terrible luck.
I look at you, you look at me, I raise my right, you raise your left
Other terms for this handy device include doohicky, doo-dad, and whatchyamacallit.
How did the farmer find his wife?