Made a couple of these for my nieces.
Let it glow, let it glow!
I discovered the best glow in the dark paint whilst working on this project. It's called Aurora and after charging it under a light source it glows incredibly brightly. The down side is that it dries a little grainy but it didn't matter too much in this instance.
The prints were sanded and painted green. I then painted the Aurora into the pattern on the stone surface, wiping away any mistakes or overspill with a tissue (or my finger tips). I sealed it all under a coat of clear varnish.
Despite washing my hands I found my finger tips were still glowing when I went to bed.
The best glow in the dark paint ever.