The decently enjoyable lightheartedness of the first two acts (pleasant animation and voicework provide some chuckle-worthy gags and fun sequences) grows by three sizes in the third as the Grinch’s redemption arc is completed with a refreshing and poignant childlike straight-forwardness (“It was me. I stole your Christmas. I stole it because I thought it would fix something from the past. But it didn’t”). Doesn’t break any new ground but it sure broke my tear ducts wide open in the end.