How do you take a picture like this??

a href="http://www.flickr.com/photos/kiwi_gal/2770033060/" rel="nofollow"http://www.flickr.com/photos/kiwi_gal/27…/a How do you get the bubbles to be so bright, colorful, and in focus?? Also how do you get both the bubbles and person blowing the bubbles in focus and still have the background out of focus?? Do you use manual focus?? What aperture and shutter speeds would be good?? Thanks!!