Officials say it happened as Jacob Stoltzfus of Spring Mills was helping his father with a machine that wraps hay bales Tuesday afternoon.
State police at Rockview say the boy's head was caught in a part of the machinery that compacts the hay.
Coroner Scott Sayers says the boy died instantly of massive head trauma. The death has been ruled an accident.
Information from: Centre Daily Times, http://www.centredaily.com