Even my two-year old enjoyed pressing the button on the carbonator, which often makes a "raspberry" sound when you add extra fizz.

ENGADGET: Switched On: The rules of Soda Club (Part 1)

And with this carbonator we can actually control it.

NPR: At Chez Panisse, It's Time for Tap Water

Mr. KOSSA-RIENZI: Yes, we have a carbonator.

NPR: At Chez Panisse, It's Time for Tap Water

Fill a bottle with cool water, screw it into the carbonator, press the fizz button five or six times, add the mix to the bottle (I recommend doing this over a sink), close the bottle and shake a few times.

ENGADGET: Switched On: The rules of Soda Club (Part 1)