https://www.cnet.com/news/this-nintendo-labo-solar-powered-accordion-is-so-clever/

"This Nintendo Labo toy-con creation uses sunlight to trigger the sound instead of the iconic reflective stickers. That allowed me to keep the build simple and easy so anyone can try making one," Momoka Kinder wrote in the description of her YouTube video demonstrating the invention.

The right controller detects sunlight at all times, while the left controller detects rotation to change the music's volume depending on tilt, according to the contest entry page. This accordion was honored in the category of best original invention using Toy-Con Garage.