While children secured with bungee cords bounced on trampolines at the Wilmington Friends Meeting House on Quaker Hill on Sunday, Tate Muratori-Levit and Josh Cooper stood nearby at a pingpong table awaiting challengers.

The two boys had taped a sign to the table that read "beat the pro." For 50 cents a pop, they challenged opponents at the Friends' third annual Berry Festival. The afternoon featured sunny skies and a breeze that made table tennis a little complicated.

"You sure you're ready? I will ace you," Tate, 13, told the first competitor.

It wasn't an empty promise -- they won the game, but the man who took them on wandered away before the boys could collect their winnings.

"We just got hustled," said Josh, 11, who was holding his paddle in his right hand and a cup of freshly squeezed lemonade in his left.

"If everyone would pay, we'd make a lot of money," said Tate, who is the self-proclaimed best pingpong player in his family.

The boys didn't seem to care much -- later they were collecting money for tickets to go into the festival, which was held as part of the Harmony on the Hill program started in September 2007.

The festival, which was free to children 12 and younger but charged for adults, helps raise funds for the Wilmington Friends Service Committee, said Mia Muratori, an organizer of the event.

Musicians at the festival included the Conowingo Homeboys, Cab Calloway Jazz Chords and vibraphonist Joe Baione. New this year was a harmonica workshop by Gary Allegretto; organizers gave out free harmonicas to kids attending to teach them how to play.

Children took turns sliding down an inflatable slide or made arts and crafts in a tent across the lawn.

"It's a nice event -- it's nice for the kids, and it's nice for the neighborhood," said Sally Milbury-Steen of Pacem in Terris, a nonprofit interfaith justice organization.

Wilmington Friends shares the festival with local not-for-profits, Muratori said.

The berries served in the strawberry shortcake were grown locally at Highland Orchards.

"None of the California ones that don't taste like strawberries," said Friends' treasurer Dick Harper. "I snagged some in the kitchen -- they're great."

Ava Daugherty, 8, lucked out because strawberries are her favorite fruit.

"I picked sweet strawberries because I like sweet things," said Ava, who also enjoyed doing backflips on the slingshot trampoline. "It was awesome -- it feels like you're flying."