Courtesy Britney Spears. Inset: Giulio Marcocchi/Sipa USA
September 19, 2012 06:30 PM

Game on!

Britney Spears threw a video game-themed birthday party last Saturday for her boys to celebrate Preston, who turned 7 on Sept. 14, and Jayden, who turned 6 on Sept. 12.

“The whole family had a great time,” a source close to Spears tells PEOPLE of the afternoon bash held at Sky High Sports, an indoor trampoline park in Woodland Hills, Calif.

“Britney really enjoyed herself,” adds the source of Spears, who at one point hopped on the trampolines herself to jump around with niece Maddie, 4, and played video games in Sky High’s arcade.

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Also at the bash: The X Factor judge‘s fiancé Jason Trawick; her father Jamie; brother Bryan and his wife Graciella; and adorable young British music enthusiasts – and frequent guests of The Ellen DeGeneres Show – Sophia Grace and Rosie, whom Spears met on the talk show recently.

Preston and Jayden’s friends enjoyed pizza, ice cream and a Call of Duty-inspired cake. The birthday boys also opened a few gifts including Spider-Man gear and Nerf blasters.

“They loved them,” says the source. “They’re such boys.”

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