(1) First off, we've got the so-called Chinasaurs. At the dawn of D&D, before commercial fantasy miniatures were available, these not-so-authentic plastic (quasi-) dinosaurs of Asian manufacture not only became various monsters but directly modelled the now-legendary bulette and rust monster, among others. These things are iconic.
(2) But we also have plastic cowboys (and Indians), which were used for more than the occasional session of Boot Hill. The horses were handy, and some of these playsets came with always-useful plastic terrain where an adventure called for such additions...
.png)
(3) Of course, actual dinosaurs and other prehistoric animals were good not only to represent themselves, but alternately, similar mythological monsters. Brontosaurs might be dragons, minus the wings, but nonetheless serviceable. Really, any four-legged reptile makes a great reptilian horror, whether basilisk or wyvern, without straining credulity.
Oh, and these sometimes came with cavemen and even better terrain than those wild west playsets, especially when an encounter called for steaming jungles or mountains...
(4) And (not so) finally, we've got farm (and wild) animals of various kinds. Lions, tigers, and bears are frequent adversaries, and might sometimes pass for things magical, including African lions for chimeras or sphinxes, among other combinations. But these things in their conventional (read: natural) guises remain respectably deadly enemies.
It's a start. Some groups have been known to incorporate model terrain. Yours truly once participated in a game where an Aurora snap-together allosaurus became a demonic enemy all the more terrifying for the scale involved. There's no end to the great accessories now available, and who doesn't like them? But the amateur origins of our pastime shine through when we improvise and make the experience our own, something repurposing toys can accomplish. Anyway, it's something to consider this Christmas and all year, really...
