Rex the Tyrannosaurus was one of the Dinosaur Trio in the 2000 McDonald's Teenie Beanie Babies promotion. It was sold in its own box, rather than one of the 18 numbered Happy Meal bags that made up the rest of that year's set. It has no full-size Beanie Babies counterpart on record, which makes the Teenie its only physical form. Like the rest of the 2000 promotion, it was produced in large numbers, so a sealed box alone does not create much value.
