If you prefer to shop in person, you can try checking out outdoor gear stores like REI or Dick's Sporting Goods. They usually carry a selection of glow sticks, including Katseye Lightsticks. The staff might even be able to give you some tips on how to use them.
KATSEYE OFFICIAL LIGHT STICK TEASER Acordes - Chordify
One fun fact about Katseye Lightsticks is that they're really popular among festival-goers and ravers. They use them to light up the night and add to the overall vibe of the party. Who knows, you might even start a glow stick trend!