Megan Fox Doesn't Bring Her Sons to Set: 'It's a Dangerous Place for Kids'

"He tripped over a wire and busted open his lip," she says of her son's first visit to set

With her new gig on New Girl, Megan Fox is a busy working mom of two.

But the actress says her little ones, Noah Shannon, 3, and Bodhi Ransom, 22 months, won’t be visiting her on the comedy show’s set.

“I took Noah for the first time when he was 2 to the set of [Teenage Mutant Ninja Turtles],” Fox told PEOPLE at the New Girl 100th Episode Cake-Cutting Celebration on Wednesday.

“It’s a dangerous place for kids,” Fox, who plays reporter April O’Neil in the film, adds. “He tripped over a wire and busted open his lip, so I’ve never brought my kids back to set.”

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As for her son’s milestones, the proud mama, 29, says Noah “is just growing up really fast.”

“Yesterday, he was like, ‘Mommy, I’m your baby?’ And I said, ‘Yeah.’ And he said, ‘But this baby is growing up.’ I was like, ‘Woah. Yeah,’ ” shares Fox, who says Noah also, “writes Haiku poems.”

But even though he’s growing up quickly, Fox knows she can always count on her little man.

“Once, he grabbed my hand and he said, ‘Mommy, I’m going to hold your hand so that I can help you if you ever fall down,’ ” Fox recalls. “He was 2 when he said that.”

And with the holidays right around the corner, Fox — who’s “big into Christmas” — is “going to do all sorts of Disneyland, Disney on Ice, Trans-Siberian Orchestra [trips and] really gear up for that day,” she says.

— Mariah Haas