Arthur Ashe Kids’ Day presented by Hess took the USTA Billie Jean King National Tennis Center by storm Saturday, bringing tennis and entertainment to thousands of young fans.

The grounds festival early in the day gave children and adults alike the chance to test their tennis skills on court and, in some cases, against some of today’s rising tennis stars.

The Hess Express Obstacle Course had young fans demonstrating their agility and tennis skills with such activities as hula-hooping and hitting balls on targets for the chance to win great prizes, including tennis racquets and binoculars.

The Nike GO Tennis court brought on the star power, giving children the chance to hit with pros Donald Young, Mary Joe Fernandez, Max Mirnyi, Daniela Hantuchova and more.

At the USRSA Pro Racquet Round Up, fans experienced the thrill of hitting with the same racquets used by their favorite players, including Andy Roddick, Venus and Serena Williams, Andre Agassi, Maria Sharapova and Roger Federer.

“It felt really good” to play with the racquets of her tennis idols Roddick and Martina Hingis, said Jane Beiermeister, 8, of New Jersey. “I played a lot better with a bigger racquet.”

On the “Beat the Pro” court, fans got tips from and played against the likes of accomplished young pro Scoville Jenkins, who is a repeat visitor to Kids’ Day. “It’s always great to be on the court with someone like him,” said Lanny Vaysman, 13, of Regal Park, N.Y.

“As long as the kids love it, I love it too,” said Jenkins. “If they have a good time, that’s all that counts.”

Even the smallest tennis fans got into the swing of things at the USPTA-hosted Little Tennis court, filled with many colorful hitting stations for the tennis world's future stars.

Off-court, kids lined up for face painting, hair braiding and a juggling workshop. Excitement was in the air, as fans also came face-to-face with some of their favorite players, got their autographs and watched them prepare for the US Open on the practice courts.

Then, in the afternoon, music and tennis-star power took over Arthur Ashe Stadium for a grand display of talent. Music artists Kat DeLuna, Sean Kingston, Lil Mama and The Jonas Brothers had fans on their feet with their chart-topping hits in a two-hour show hosted by MTV VJ Quddus and Daisy Fuentes.

Kingston, 17, and a native of Jamaica, brought his unique blend of reggae, rap, dance hall and pop sound to the main stage, performing his hit “Beautiful Girls.”

“I like to do something for the kids,” said Kingston, who was inspired by the legacy of the event’s namesake, Arthur Ashe. “(He) was a legend in giving back to the community.”

Also on hand for the Kids’ Day festivities were pro skateboarder Tony Hawk and comedian and former "Saturday Night Live" cast member Chris Kattan (sporting a white tennis skirt and working the umpire’s chair), singer Rob Thomas, comedian and actor Chris Rock, and WWE pro wrestler John Cena.

Cena teamed up with Roddick against Martina Hingis and Ana Ivanovic, at one point suffering an unexpected “smackdown” from tennis’ top American when he missed a ball.

Despite his enormous muscles and evident confidence, Cena admitted it was easy to feel a little nervous about being out of his “element” and onto someone else’s home court.

Also during the stadium show, winners of the Valspar Paint Performance Challenge during the US Open Series and at Kids’ Day itself hit the court in Arthur Ashe Stadium for target practice alongside the likes of the world’s top two players, Roger Federer and Rafael Nadal, raising $17,500 for charity.

The Arthur Ashe Kids’ Day stadium show will air Aug. 26, at noon on CBS.

Arthur Ashe Kids’ Day honors tennis legend Arthur Ashe and continues his mission of using tennis as a way to teach children humanitarianism, leadership and academic excellence. A portion of the Kids’ Day proceeds benefit the USTA NJTL.