Love this idea! I would have more than one glow stick on hand in case one doesn't put out enough glow. I would also put the glow sticks in sealed plastic baggies for safety in case they opened up. This site has several good ideas for Halloween.
Hydrogen Peroxide an awesome fountain cleaner, almost magic in the way it works. clear a green and murky fountain to crystal clear water in 24 hours. does not hurt wildlife because it turns into oxygen after 24 hours
DIY Outdoor Solar Light Display : 2 fence posts + 4 solar outdoor lights + 8 extra long screws + an long scrap of treated x wood. great idea for the deck or patio! Would probably use nicer solar lights!
Or plant some succulents in old drawers? Be still my heart. I really love this idea. The mix of weathered wood, stones and the wonderful texture of succulents speaks to me. I have some old sewing machine drawers that would be perfect for this project.