Insider Brief:Insider Brief:

• The Quantum Kid brings quantum physics to wow² Space at ETH Zürich on October 31 — Halloween! — with 10-year-old Kai dressed as the Grim Reaper.
• Families and quantum-curious kids in the Zurich area are invited to come along.
• Tesseract Quantum is crowdfunding CHF 3,500 for a professional video of the event and 200 printed quantum flyers for the audience.

Halloween is just around the corner – and at ETH Zürich this year it’ll be blended with quantum physics! On October 31, 10-year-old Kai will take the stage at wow² Space dressed as the Grim Reaper, ready to ask some of the biggest questions in science in the way only a 10-year-old can.

If you’re in Zurich that day and have kids who love spooky costumes, curious questions, or both — come join us! Bring the family, wear a costume if you like, and watch Kai do what he does best: get scientists to explain the weirdest ideas in physics in plain English.

The Quantum Kid started as a small idea from Tesseract Quantum, a nonprofit based in Meilen, back in June 2025. Since then, Kai has sat down with leading quantum researchers on his YouTube channel, always with the same simple request: “explain it to me like I’m 10.” Somewhere along the way, that turned into over 120,000 subscribers, nearly 3 million views, and a 2026 Webby Award nomination.

To make the most of this Halloween appearance, we’re bringing in a professional videographer to capture it properly, so it can become a full episode for the channel. We’re also printing 200 quantum-physics flyers to hand out to the families and schoolkids who come along — something fun to take home after the trick-or-treating.

That’s what your donation goes toward: the videographer, the edit, and the flyers. Every franc goes straight into making this a great day for the kids in the audience. We’re raising CHF 3,500 (minimum CHF 2,500) between now and October 25.

A few ways to join in: a thank-you video from Kai himself (CHF 20), your name in the episode credits (CHF 50), a flyer signed by Kai (CHF 100), a full flyer set for your kid’s class (CHF 250), or your logo featured in the finished episode (CHF 500).

Support the campaign — and come say hi if you’re in Zurich on the 31st: https://www.lokalhelden.ch/fr/quantenphysik-fuer-kinder

Watch more of Kai’s quantum adventures and learn quantum together with us on our YouTube channel: https://www.youtube.com/@KaiTheQuantumKid