Students got a lesson about life back in William Penn's Day.

MORRISVILLE, Pa. (WPVI) -- Kids got an up close and personal lesson Thursday in what life was like back in William Penn's Day.

1,700 students from schools throughout the tri-state region took part in the Annual Pennsylvania Day Celebration at Pennsbury Manor in Morrisville, Bucks County.

They took a step back in time, and saw what life would have been like back in the late 1600s.

That included how sheep's fur is turned into yarn!