Living Books and GT Interactive had entirely different interpretations of Little Monster. On the Living Books side of things, most of the characters sounded like young kids and were energetic, whereas they had rather deep voices and were much more easy going when GT Interactive gave it a shot. It's also a bit weird to see Little Monster's pet Kerploppus go from acting like a dog to becoming a talking anthropomorphic character just like everyone else.
Simon has a raspy and higher pitched voice in all of the samplers compared to his role as the narrator in The Tortoise and the Hare.
Keep Circulating the Tapes: The titles based on Dr. Seuss books will likely never see release on modern tablet devices as Seuss's books are exclusively licensed to Oceanhouse Media, Inc. as far as interactive apps go. Mercifully, the CD-ROM versions are among the most reprinted in the series.