This latest play to the dinosaur market is nothing but a series of cartoons with captions, all featuring a tad in superboy costume, cape and all, and his dealings with various dinosaurs. And so we see ""Superdan returning a lost baby brontosaurus to its mother."" ""Boy, I'm sure glad it wasn't the mama that was lost,"" says Dan in a thought balloon. But one is already beginning to wonder how far Dan can carry the joke. Then come: ""Superdan teaching tyrannosaurus how to brush his teeth,"" ""Superdan disco dancing with an iguanadon,"" ""Superdan washing dinosaur dishes"" (he's standing in the dish with a floor mop), and a total of 15 such one-liners. All derive their humor, such as it is, from the incongruities implicit in the dinosaurs' size. The rewards are small.