I had no idea that the 1987 Alvin and the Chipmunks movie, "Chipmunk Adventure", was such a tear-jerker.  Apparently, I must be too old.

Here's video of a little girl who looks like she's about two, watching it in the backseat of a car.  And during a song about a baby penguin that needs its mother . . . she can't stop crying because it makes her so emotional.  Then they're reunited at the end of the movie, and she really loses it.

She cries at :16 and 1:12, and the penguins reunite at 2:04.