This isn't the first time a non-dinosaur has been lumped into the dinosaur category here on the blog and it won't be the last. As kids growing up in the '50s and '60s, we knew these weren't dinosaurs, but we just didn't care. For us, 'prehistoric' was good enough! To be fair Marx didn't market these as dinosaurs but rather as prehistoric monsters, prehistoric animals, or prehistoric mammals, and that would be good enough. It was just our childlike imaginations which lumped them together with dinosaurs.
The herbivorous Megatherium (great beast) was a contemporary of man and lived during the Middle Pleistocene to the early Holocene in what is now South America - about 400,000 to 8,000 years ago. Also referred to as the Giant Ground Sloth these suckers were huge and would have stood about 3m/12ft high on its hind legs! Marx's version measures 3" (7.62cm) L x 3 1/8" (7.93cm) H. Enjoy! Opa Fritz