Very rarely do you come home with a picture that surprises yourself. You snapped the shot and didn't think about until you saw it. And then the moment came.... wow what a great photo. This is one of those photos.

What I Did to It

This photo, like others, was under-exposed. I increased the exposure until the faces seemed brighter. I also increased the vibrancy almost to its upper limit. The last touch was a vignette filter to give focus to the center.

What's Bad

It's really hard to find something wrong with this photo from a composition standpoint. The one flaw I see in particular is the woman on the right's eye shadow. Increasing the vibrancy definitely made the colors pop, but also made her makeup seem like a clowns. If I were to fix this, I would brush the vibrancy away over her makeup.
Another flaw is that the sky is over exposed. This was a spring evening sky with lots of color and its completely lost. The only way to get that back would be a bracketed exposure which is then photoshopped in. Since I was doing a wedding this day, I had limited time and shots.

What's Good

By far this image excels because of the ephemeral moment it caught. The composition is great. There are three people (the magic number) to focus on so it stays interesting, and they each have different expressions. The bubbles are frozen in time (you could argue this is bad and hides their motion) but I somewhat prefer their static nature in the photo. The expression on grampa's face is somewhat overly goofy, but somehow fits his demeanor, while grandma to the left mediates his goofiness with her dedication to the bubble wand. The foreground is not too busy nor does it interfere with the subjects, and the background is sufficiently blurry to avoid it being messy, while also providing some perspective in the angle of the building.