I lucked out when my friend Ian, an educator, handed me a bushel of old teaching aids. In that pile was this gem, Space Creature Word Slides (Teaching Stuff, USA, 1979, #TS601).
From the copy:
I didn't bother scanning in the word slides.
IT'S ALL ABOUT THE SPACE CREATURES !
Can you smell the purple ??
Space Creature 1
(Space creatures illustrated by Bron Smith)