George Washington could throw a quarter between two and eight miles, bite through a cherry tree in a single bite (provided he had his "wooden" teeth in), and survive sub-freezing temperatures indefinitely. He was between 6'8" and twelve stories tall, weighed one (non-metric) ton, possessed perfect hands, a crystal horse, a schnauzer, a mason ring and several wigs. He also apparently could throw a knife into heaven and may or may not have had an excessive number of sexual organs.
Ben Franklin could invent anything, including things from the future. He could also call down lightning from the sky, and was impervious to sexually transmitted diseases.
Thomas Jefferson was a polymath, which means he could take on the form of any man, living or dead. He could also fire lasers from his eyes and/or wig, breath under water, and speak French.
John Hancock could sign anything (Anything.) first.
John Jay, "the Judge" had the strength of ten gorillas, and had a magic gavel that would usually come back to him when the threw it. He could also turn mostly invisible to historians.
James Madison could grow to any height, but choose not to out of principle. He was also a master of karate (tiger style), compromise and American Sign Language.
Alexander Hamilton could punch so hard that his fist was engulfed in flames. He could dodge bullets, matrix style, but choose not to out of drunkenness. He was a master of karate (dragon style), stalwartness and Shouting. He and Madison hated each other.
John Adams's power was rock and roll.
John Quincy Adams's power was pan flute music.
Sam Adams could drink unlimited amounts of liquor, and kill with a glare.
Andrew Jackson was impervious to bullets, but not insults to his wife. He apparently could also time-travel.
Patrick Henry could hypnotize anyone with his voice, and unhypnotize them with his eyes.
Thomas Paine could hypnotize people with his gaze, and unhypnotize them with his voice.
Paul Revere could throw is head like a boomerang.
George Wythe, Samuel Chase and Gouverneur Morris could combine to form a giant robot.