This simple design can be accomplished using a paint brush and acrylic paints. Just lightly flick your brush across your nail at an outward angle. Using acrylics allows you to wash off your mistakes. If you have a steady hand, use nail polish.
"Break a glow stick and put in clear nail polish." DO NOT DO THIS HOLY CRAP! There are some toxic chemicals in glow sticks that have not been tested on nails. They make glow in the dark polish that is safe, just buy some.
Fairly easy-to-do, really stunning nail art: Eastern Night Cocktail - use purple and magenta gradient using wet sponge. Then apply one matte nail polish coat. Then take dotting tool and with ordinary top coat nail polish start to make some dots.