Jim Henson changed the face of television. His creations Kermit, Miss Piggy, Bert and Ernie, to name but a few, are now known around the world. A new show opening tomorrow at the Children's Museum in St. Paul gives visitors a chance to meet the characters. They'll also get a behind the scenes look at how muppets are made and how Henson led innovations in the puppet industry to make them more life-like and expressive. Word of Mouth's Marianne Combs has this report: {(note + 1:07 in music ends clean)