I'm so happy to hear that you're going to watch How the Grinch Stole Christmas! It's one of my favorite Christmas movies and it's always fun to watch it with someone else. I think you're going to really enjoy it. I'll tell you a little bit about the plot so you can get an idea of what to expect. It's a story about a grumpy old grinch who lives alone in a cave and hates Christmas. One day, he decides to steal all the presents from all the children in Whoville, but he soon learns that Christmas is more than just presents.