Police Sgt. Chris Scott says the teens came across the man's body in a wooded area at Beaverdale Park on Saturday morning.
He says the teens had accompanied their siblings to the park's egg hunt but wandered away. The body was found at least 300 yards from where the egg hunt took place. He didn't know how old the teens were.
About 100 children participated in the annual event.
Police say they don't suspect any foul play, and an autopsy is planned.
The man's name hasn't been released pending notification of his family.