Yuss!
The polish floats and spreads a bit on the water. You do droplets of alternating colors in the center of each previous drop to create a kind of bullseye, then use a tooth pick to distort the bullseye until you get something you like. Next is the dipping which can be tricky. You wanna start with your nail as paralell to the water/design as possible. Dip it in and then you can straighten it to point to the bottom fo the container if you like, but don't take it out right away! Instead take your tooth pick and use it to collect the extra polish from the water surface that isn't attached to yer finger, so when you take your finger out of the water the extra polish doesn't mess up your design.
The pictures in the first post are my hands after my first attempt at it. :3
My second attempt (done just 20 minutes ago)