I use La Rock's as my primary supplier, but likely you can get them at most others (I've never looked); but anyway... The product is "Magical Bubbles."
Simple enough magic with a nice effect; allows you to "pluck a bubble from the air." When I do this at parties or events, I give the magical bubble out to the host/person of honor as a gift.
http://www.larocksmagic.com/magic/magic.htm <-- link to magical bubble