The Grinch's heart grows three sizes that day. He realizes that Christmas isn't about presents or material things, but about love, kindness, and togetherness. He decides to return the stolen gifts and decorations and plans a huge Christmas celebration for the town. The Grinch becomes a beloved member of Whoville and spreads the message of Christmas joy and goodwill to all. The Grinch also finds out that the Christmas tree was actually a magic tree that can grant wishes.