This was found in a Mailbox magazine.  The author is Janet L. Richardson.

Punctuation Rap is a game we play.
It's fun to do, and we can learn that way.

Take the period, the period; he's not hard to understand.
you'll find him at the end of a sentence or command.
He marks abbreviations, shortens words that are long.
Don't forget the period,; he's small, but strong.

Question mark, question mark, what did you say?
He follows a question; that's the only way.

Wow! Awesome! Rad! Hurray!
The exclamation point is next; he's got something to say.
He follows something loud; he's excited to play.
Don't use him to much; he won't be special that way.

The comma is next; he is used a lot.
He can separate a list of some groceries you bought.
You'll find him in the middle of the year and the date,
between two adjectives, or a city and state.

You can join two sentences with a "but" or an "and".
Just remember the comma, he will give you a hand.
There is one more place that our comma has been.
He' after a clause - that tells you when.

The dash - the dash - he's here, then he's gone.
If you need to make a pause, you can bring him along.

Quotation marks are nosey.  They have no reservations
About hanging around in any conversation.
You must put quotes around a thing that is said,
And also a poem or a story you've read.

The colon(:) likes to show a list that will come.
His brother, the "semi" (;) will not be outdone.
The semicolon joins two sentences with no "and";
If you've too many commas, he can take a stand.

So remember this rap; it will make you smart.
Punctuation is easy; you can learn it by heart.