Heyyyyyyyyyyyyy,
Its been a while hasn't it haha, well I'm dropping in because I had a neat idea for a little project. I got the idea when I was hanging with my girl, her dad was playing this little app where you make a sheet of bubble paper and if you run over it with your mouse it will 'pop'.
So, I was thinking of this, just layed out off the top of my head.
Make a border on the screen for the edge of the sheet and then draw the circles using some math. As for the sound, anything will do I guess, and then you'll check if the mouse is over one of your circles and if it is play the sound and add a little graphic or smaller circle to indicate the pop.

Coffee coffee coffee coffee coffee coffee cappacino, JAVA!