At Grinchmas at Islands of Adventure, the popular Dr. Seuss book “How the Grinch Stole Christmas” is brought to life in the heartwarming live stage show, “Grinchmas Wholiday Spectacular,” starring The Grinch and the Whos from Whoville. Grinchmas is part of Universal Orlando Resort’s Holidays celebration, running from Dec. 3 to Jan. 1 and featuring live entertainment that the whole family can enjoy.