NEW YORK (CNS) — For better or worse, bathroom-themed gags have long been a staple of kids’ movies. But the family road comedy “Diary of a Wimpy Kid: The Long Haul” (Fox) carries this trend to excess.

Together with a noticeable lack of creative drive, writer-director David Bowers’ reliance on scatological humor blights his adaptation of the eponymous novel by Jeff Kinney, the fourth installment of a screen franchise that began in 2010.

As his family sets off on a cross-country journey to attend his great-grandmother’s 90th birthday celebration — a trip his mother Susan (Alicia Silverstone) hopes will foster family unity — mild-mannered middle schooler Greg Heffley (Jason Drucker) worries that being confined together in a car for hours on end will have the opposite effect on his often-quarreling clan.

He also rails against Mom’s ban on the use of electronics during the trip, a prohibition his overworked father, Frank (Tom Everett Scott), likewise finds it difficult to obey. Still, Greg has a plan to turn this unwelcome outing to his own advantage. To read more, click here.