Matilda is a wildly successful musical (both in England where it originated and here in the States) based on the 1988 children's book of the same name. But I had no familiarity with either the source or the musical when I arrived at the Orpheum Theatre yesterday, which is often the best way to experience theater. I found Matilda to be charming yet dark, with some breathtaking physical and acrobatic scenes. And the children of the cast are so good, I almost suspect they're just short adults and not really people who have lived on this planet less for than a dozen years. There were lots of kids in the audience too, and while it's a pretty late night on a school night, and perhaps a bit dark for the young ones, it's a wonderfully thrilling musical for any age.