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Recycling seems to be the spirit of the day, seeing as how this motley ensemble of characters has slipped into an almost sitcom-like mold with each new sequel feeling more like an extra-long Looney Tunes cartoon than a fully developed feature. Kids will recognize (but probably won’t mind) the repetition of the frazzled rodent’s opening-comedy routine from an earlier self-standing short, “Scrat’s Continental Crack-up,” which Fox attached to “Gulliver’s Travels” in 2010, while a later lost-at-sea vignette repeats a short shown before “Alvin and the Chipmunks: Chipwrecked.”

As per usual, pic opens with Scrat, as the saber-toothed squirrel’s quest for the elusive acorn splits the ice, then the continents and eventually Manny’s family.
