Grown Ups 2 is the direct successor of Grown Ups and so there is a reunion with most actors who have been found funny in the predecessor or not. The story, if you want to call it so, revolves around the life after the holiday in the first part, but here are several years passed. The children of "Grown Ups" have grown, are in puberty, have love problems and need with bullying at school are ready, so actually problems that good parents would solve educational and useful ... However, you must of "Grown Ups" no expect valuable educational film by responding with much pathos and emotion to such problems, but these dissolve quasi exhilarating way on yourself and that makes the film: it's a feel-good movie in which does not sit every joke and also the humor from time to time quite deep slips, but I personally found it very entertaining and funny.
In short: Grown Ups 2 tries to spread any moral values or pädogogisch valuable lessons (in contrast to the first part, was in the yet to recognize such a thing as morality), but is a just a movie successor with more slapstick and more "legs knockers" I personally found funnier than the predecessor.