The seven youths spent a full day taking turns bouncing in a large inflatable castle at the Bounce-a-Lot in Flat Rock, Mich., and think they're in line for a world record, The Detroit News reported Sunday.

The boys, who know each other from summer camp and youth sports teams, got together for the attempt after Mason Brott, 10, saw the bouncing mark in the Guinness Book and thought he and his friends could beat it, the newspaper said.

They might have to wait a few months for Guinness to authenticate the would-be record, however.