I assumed it was just some squirmy rubber toy inside a plastic egg, but the ad says:
- "A lovable (sic) live pet in a colorful plastic egg!"
- "Will eat RIGHT OUT OF YOUR HAND!"
- "FREE food supply."
What the hell IS this "Live mystery egg"?? A salamander? A tiny shark? A leech? An immigrant? Whatever the hell "Puff the Magic Dragon" this ad is actually selling is, I would be freaking SCARED AS HELL to find that colorful plastic egg inside a cardboard box, and opening it.
Unboxing a product like this is the kind of stuff that YouTube was made for, if only it existed in 1971.
From Amazing Spider-Man #98, July 1971.