Oh man, you reminded me of LED magnetic throwies, just little homemade LEDs with a watch battery and a magnet. Throw em wherever they'll stick, they're like $.50 to make. Seems like the 00s version, if a little less ubiquitous
We just wanted to bring a little light into this dark world with pretty glowing stickers, if anyone killed it, it was these damn boomers and their rock and roll music.