Fisher Price Dinoroar internal component?
I had one of these cute dinosaur plushie toys as a child in the 90s that when you squeezed it, it made a "roaring" sound, but I never really understood how it worked. Now that I am an adult, I am curious about the internal component that made it "roar" because it did not use electrical or battery operated components at all and I don't want to dissect my childhood plushie to find out how it worked.
Does anyone have any idea how the internal components in these toys worked?