Rusty and Eric don't usually enjoy grammar, but today they're in for a treat. Mrs. Jones is absent, and Mr. Graham is the substitute. What's so special about Mr. Graham? Nothing, until he uses the Magic Chalk to make the nouns written on the chalkboard appear in the classroom With Mr. Graham and his Magic Chalk, Rusty, Eric, and the rest of the class learn that a noun names a person, a place, or a ... killer dinosaur