Gabriel’s Show N Tell came out when I was ten years old, so I’m not surprised I didn’t notice it back then, I was all about action figures at that point.
A really novel approach to the “Book and Record” format I loved, I can’t imagine it had a long life at retail with affordable VCRs looming closer and closer….
AKA Brian Heiler author of "Rack Toys: Cheap, Crazed Playthings" and co-editor of "Toy-Ventures Magazine". Co-Host of the "Pod Stallions" podcast. Host of the Brick Mantooth Youtube channel, painter, designer, writer, mental health advocate, toy collector, Mego, and Mego Knock-Off enthusiast. I have large feet, ADHD and I live in Canada. Talk toys, not others. 
@brickmantooth
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Toy-Ventures Issue 12- Stretch Monster
Knock-Off Book
I absolutely had one of these when I was a kid.