The America's Got Talent judge, 40, finally comes clean as to why she was seen taking home six evergreen trees earlier this month.
"This year for the first time [the kids] each have their own tree in their room," the mother of four told PEOPLE while hosting a Creativity Holiday Party at Children's Hospital Los Angeles. "That's a lot of trees, I know. They were taking photos of us when we left the lot, and they were like, 'Oh my gosh, they've got the whole forest!' But it's because I have so many kids!"
So what is Klum's brood hoping to find under their trees this year?
"They don't watch a lot of TV, so when they do they're so mesmerized by the commercials. They love all these silly things like glowing pet pillows. I actually got them all unicycles," said the Truly Scrumptious for Babies"R"Us designer.
She also dropped some hints on what she may be giving her beau Martin Kirsten when describing her ideal Christmas gift to give a significant other.
"It's spending time together, like a weekend away at a cool hotel by the beach, or flying to Vegas for the weekend, so you can create a memory together," said Klum. "Or going to the spa together. It's fun to do that with your boyfriend."
As for what's on her own Christmas wish list, the Project Runway host has more of a DIY approach.
"I love arts and crafts, and I like when my kids make things for me," she says. "I have an entire wall on the second floor of the house that's all [their creations]."
Klum channeled her love of creating at the Children's Hospital Los Angeles party she hosted on Tuesday afternoon, where she and several young patients used FiftyThree's Paper iPad app and Pencil stylus tool to create holiday-themed drawings.
"I think it's amazing what they do here," said Klum, who has been involved with the hospital for several years. "I usually come once, sometimes twice a year, and I visit the kids and I do arts and crafts with them. It's hard, especially during the holidays, for the kids that have to be here."
Klum Tweeted a photo of some of the patients with their works of art, writing, "Spending time @ChildrensLA Hospital & getting creative w/ @FiftyThree & #TrulyScrumptious @BabiesRUs #madewithpaper":
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