Everybody says that if you homeschool your kids you'll learn all kinds of things.
We just read this morning (yes, I know, we were learning on Saturday... but we didn't mean to, for cryin' out loud), that Leonardo da Vinci was quite the practical joker. In 1513 he traveled to Rome with his patron Giuliano de Medici, the brother of Pope Leo X. Pope Leo apparently liked a good laugh, so he kept Leonardo around.
One of Leonardo's favorite tricks was to (and I quote): "fix a sheep's intestine onto a large bellows. Hiding out of sight, he would pump the bellows, inflating the thin, expandable intestine until it filled the room like a giant balloon and flattened people against the walls."
Not surprisingly, the boys enjoy history.