Our Founding Fathers

I'm attempting to pen a song about the founding fathers for a YA book that I'm currently writing. A group of twelve-year-olds at an urban park district summer camp will be singing it during a Fourth of July pageant that they're putting on. Here's what I have so far:

Big George Washington, who never told a lie,
Stood tall with his troops and the King they did defy.
The Gen'ral of the army and our first President,
Gained freedom for all, 'cept those of African descent.

Then there's Jefferson, a warrior with his pens,
Wrote the Declaration of our Independence.
A man of eloquence, his words saved and engraved,
And fathered several children with a girl who was his slave.

Slave-owner James Monroe, President number five,
Fought against the British and a wound he did survive.
Claimed for our dominion the Western Hemisphere
And made sure that we were the only colonizers here.

Little John Adams, a man of principal
Champion of rights for all who were invisible.
Never owned a slave, which was a point of pride,
The first President in the White House who did reside.

Benjamin Franklin, the only self-made man
He was a thinker and a doer, not a Minuteman.
He fought for democracy and wanted rights for all,
But the slave-holders said "No" and laughed in their southern drawls.

The Fourth President, a man named Madison,
Inherited his land and slaves and annexed the Cajuns.
He thought Africans against the whites might rise,
And that's why he supported the Three-Fifths Compromise.

I'd like it to be lightly humorous and to poke fun at the glaring inconsistencies that these men exhibited, preaching about freedom and equality while holding firmly to their ideas regarding the place of those who weren't born as landed white males.

Certainly, the song needs to be rewritten, but hopefully it's not a horrible first draft...