Literally.

His donated heart.

But Caleb was more than the heart.

He was the brain that drew terrible cartoons of his teachers.

The voice singing off-key in the shower.

The scar on his chin from falling off a bicycle at eight.

The boy who could never find socks.

The teenager who once drove forty minutes back home because he thought he had left the stove on when we did not even own a gas stove.