From this A.O. Scott film review in the NYT
Most of “Blended” has the look and pacing of a three-camera sitcom filmed by a bunch of eighth graders and conceived by their less bright classmates . . . .
You see very little of that here. You see a lot of overdone reaction shots and strained attempts to generate credible emotions in a story that has no room for them. It has time for maudlin tributes to the virtues of parenthood, for moments of cherubic cuteness and adolescent awkwardness from the kids — blameless young actors whose résumés will outgrow this embarrassment — and for one or two honest laughs, mostly courtesy of Kevin Nealon as a cradle-robbing fellow vacationer who speaks almost entirely in gerunds.
“Blended” is rated PG-13 (Parents strongly cautioned). It will make your children stupid.