By peoplestaff225
Updated March 25, 2010 04:00 PM

When he grows up, Barron William Trump “says he will be a businessman and golfer like his daddy” Donald Trump, notes Melania Trump. But based on his recent fourth birthday bash, you’d think he’d be gunning for his pilot’s license!

Along with the Donald, Melania — who launches a jewelry line April 30 on QVC — toasted the littlest Trump at Manhattan’s Intrepid Sea-Air-Space Museum this past Friday.

The two-hour affair featured submarine and helicopter tours, chicken nuggets and pizza — all enjoyed by 20 of Barron’s new preschool friends.

“Barron loves helicopters and airplanes,” the model mom explains of the high-flying theme, enhanced by an airplane-shaped chocolate-and-vanilla cake, modeled after Trump’s private jet.

“It said ‘Barron Trump’ on it, just like his daddy’s plane,” she says. “The children had a blast.”

Though this was Barron’s first birthday party in New York — the Trumps normally celebrate at their Mar-a-Lago estate in Palm Beach — Melania kept certain elements consistent with parties past.

“Every year Barron has huge balloons with [his age] on them. It’s nice to have at least one tradition,” she says. “Barron was in a great party mood, and Donald had a great time too.”

Sounds a lot less intense than firing celebrities in the boardroom, no?

“Well, I guess it’s a little bit more relaxing for my husband, being around 4-year-old kids running everywhere,” says Melania. “But even with them, you never know!”

Check out additional photos of Barron’s birthday party on Melania’s Facebook page.

— Suzanne Zuckerman