"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.
Use a bobby pin to make polka dots on your nails. You have to bend the bobby pin apart in order for it to work but after that it's the best thing ever for making polka dots! I did it for my birthday last year!