I saw this nail art design at http://nailartsforkids.com/
I really love this design. Especially right now because my fingernails broke so I cut them. It took me one hour for this nail art. Good thing I have a french tip guide that I bought from Etude House. It guided me on creating a perfect arch of the rainbow.
This what I came up. i just added some glitters and I altered some design and maid it my own. But all in all, it came from the design above.