A super sulky pubescent (Liam James) is stuck with his mom and her bf (Toni Collette & Steve Carell in a non-comic role) at a summer beach house. He finds fun and friendship at a local water park. The plot’s familiar, so it’s up to the storytelling and characters to make it special. Sam Rockwell and Allison Janney create enjoyable people, but the rest of the people aren’t especially interesting. It’s predictable and things take too long to happen. Except for Sam Rockwell (as the mentor), things aren’t that funny or heartfelt when they do.