“Dumb and Dumber To,” out Friday, does not exist solely to give English majors seizures whenever they see the title, nor is it here to give copy editors a chance to build their [sic]-muscles. Instead, the sequel to the 1994 comedy is about a dim bulb’s search for his lost child. Movies are a great place for a family reunion.

‘Philomena’

What made this 2013 best picture nominee great was not only the story of a woman looking for her long-lost son, but the unlikely relationship between Judi Dench and Steve Coogan, which let both actors show off their comic talents.

‘Changeling’

It’s a happy day when a lost child comes home; however, in this 2008 Angelina Jolie movie, a mom has to deal with the fact that the police sent home the wrong kid. But he’s better behaved than her real son, so she decides to keep him.

‘Finding Nemo’

Parents have a lot of worries when it comes to their kids, especially when said kids live in the ocean with jellyfish and sharks and octopuses and sea monsters and a ton of other things that want to eat them.

‘August Rush’

A kid uses his freakish musical talent as a clue to help him find his birth parents. The melodramatic film is compelling, but occasionally loses touch with reality.

‘Empire of the Sun’

Itty-bitty Christian Bale gets separated from his folks and has to survive WWII in China, on his own. He’s pretty resourceful, which automatically makes you wonder what your plan would be in that situation.

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