This is something to do with the children when learning about Australia. They can create a glowing Great Barrier Reef:) I had to try this out just to make sure that it would work as I add into my lesson plans for the upcoming school year. I used a recylced water bottle, a large blue glow-in-the-dark glow stick, some baby oil (although I didn't really see it seperate from water) and then I plan on adding some small fish. How fun will this be when the kids see. I plan on doing right before nap so the kids can hold during rest time when the room is dark.