I would drop all of them into the deepest part of the ocean(abyss) with pressure-protected cameras attached.

Would make for some cool photography.

or you know, spam them in terraria

I'd compress them into a ball, creating my own personal star. A dripping, ball of liquid glow and plastic but a star nonetheless.

I would preserve them until next October , sell them as Halloween themed ornaments collect the profit and buy an ounce of lemon haze

Gluing them all over my garden and house, so I can piss of the neighbours at night.

Realistically, I would bring them along to club nights with my university's Rock and Metal Society. I've had fun nights out which involved broken glowsticks being sprayed on people but you have to be drunk enough first otherwise it's just some arsehole ruining your clothes, and it's still something you can do after using them to liven up a regular night. I considered stuff like breaking them open and using the fluid to paint my car, or fill a fountain pen, but I don't think that's stuff I actually want.

So yeah, I'd just use them for the same general purpose most people use gowsticks for, but I'd do it a bit more often and for free.

I still think a glow in the dark Effiel Tower is the way to go.

Since I am a big ultimate fan, I would use them to begin a weekly game of midnight ultimate.

A glow-in-the-dark frisbee, glowstick necklaces, and glowstick bracelets--one color for each team.

I'd make an enormous bridge out of all the glowsticks and see how much weight it could hold before falling apart.

Giant rave.

I would break all glowsticks open and obtain a huge amount of glowstick goo. I would then proceed to spray the world with goo equally on all surfaces, so that when the universe expands so much that it's all dark and lonely, earth will have a gentle green glow attracting possible visitors/saviors.

Might result in unwanted visitors though.

People have a tendency to overestimate how many 10,000 of something is. You can buy these things in packs of 100, so there's every chance you could find 10,000 of them in the stock room of a local shop. It's not enough to coat the planet.

Heck, even 10 billion glowsticks wouldn't be enough to coat the planet.

Volume of liquid in Glo Warehouse's six-inch industrial 12-hour glowstick: 165 ml

Surface area of Earth: 510,072,000 km^2

Surface area of land masses on Earth: 149,000,000 km^2 = 149,000,000,000,000 m^2

Volume of paint (and therefore glowjuice?) required per square metre: roughly 100 ml

Volume of liquid required to paint all the Earth's land masses: 14,900,000,000,000,000 ml

Number of glowsticks required to paint all the Earth's land masses: 90,303,030,303,030.303

Ninety trillion industrial-strength glowsticks required.