Heidi Klum Teases a Nostalgic Favorite That Might Be Part of Her Halloween Costume This Year (Exclusive)

Heidi Klum is making it work this Halloween season thanks to help from former Project Runway and Making the Cut fan favorites and UNICEF.

Klum, 51, a UNICEF USA Supporter and the unofficial queen of Halloween, is helping the organization “reintroduce” Trick-or-Treating for UNICEF’s iconic Little Orange Box, which will spotlight children and highlight “UNICEF’s core mission of ensuring every child is healthy, educated, protected and respected,” per the organization’s news release.  

In “The Box is Back” campaign, Klum is joined by Project Runway designers Erin Robertson and Kentaro Kameyama, as well as Making the Cut’s Ciara Chyanne and Jonny Cota, and tasks them with creating an idea for her upcoming Halloween costume.

She begins by asking the four to create something that is “timeless” and “retro.” As each continues to show off their designs, she tells Cota, “Think small but with a big impact.” Chyanne shows off a turquoise fabric, similar to that of the UNICEF logo, but Klum requests it be “more orange,” seemingly to be in line with the upcoming holiday season.

Then, a young boy chimes in to suggest the organization’s Little Orange Box and quickly shows it off to Klum and the designers. Klum then concludes the video by saying, “The box is back. Add some meaning to your Halloweening with UNICEF.”

Klum tells PEOPLE that "it was an absolute blast" to work with former contestants for UNICEF's new campaign. “We laughed, reminisced, and had so much fun bringing this PSA to life," she shares. "It’s always amazing when people you love working with come together for a cause that means so much.”

She also reveals that joining the movement was “a no-brainer” since she’s been “a supporter of UNICEF for many years” and is someone who adores Halloween. “I’ve had the pleasure of working on the Trick-or-Treat campaign before, so when UNICEF USA told me, 'The Box is Back,' I jumped at the chance. How could I resist combining my love for Halloween with a cause that does so much good for kids all around the world?”

Klum admits that “there’s something magical about this time of year” and that she’s “beyond honored” to work with UNICEF to “spread their message” during the season she loves. But she notes to PEOPLE that “the truth is, UNICEF’s work is important all year round.”

Klum, known for her extravagant annual Halloween costumes, confesses that “choosing one favorite Halloween memory is nearly impossible.” 

“Every year, I go all out with my costumes, so each one holds its own special place in my heart,” she says. “The fun is in trying to outdo myself every year, but what really makes it memorable is the excitement and joy of the whole Halloween experience — there’s just nothing like it,”

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The Little Orange Box — which first launched in 1950 — features a QR code to Trick-or-Treat on UNICEF’s website. Participants can help raise $5 for UNICEF USA by engaging in a “click-or-treat” experience, exploring stories from children around the world, and learning about UNICEF’s work in 190 countries and territories.

As for whether or not Klum will sport a Little Orange Box as part of her costume this year, the supermodel teases, "Hmm ... let's just say you'll have to wait and see! You know I love a good surprise."