What I like very much about this photograph are the happy faces. They are not faked in any way, this is real fun. When I shoot family portraits, I always try to make it an opportunity for the parents to spend some quality time with their kids. This is my secret recipe to catch real emotions which I think will bring back more intense memories in the future.
This photograph is shot at 1/15s with natural light only. It's hard to get fast moving subjects sharp at an exposure that long. So it's good or even essential that your camera has a rapid burst mode. I like my Canon EOS-1D Mark III for that.