The Meltdown, youngsters may fret over whether the animal heroes will reach their new home safely, parents may wonder how all this melting ice pack parallels the current concerns over global warming, and 20th Century Fox Animation may have to figure out what to do with the bounty undoubtedly flowing its way from boxoffice and DVD coffers. Ray Romano again heads the voice cast, reunited with John Leguizamo and Denis Leary from the original 2002 "Ice Age." The story gets under way with the zany sloth Sid (Leguizamo) running a day camp for young animals.

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