A long-lost 80s snack is back from the void, as Nature Valley revives Peanut Butter Boppers in a limited-edition collab timed to coincide with the “Stranger Things” final season. The nostalgic Fudge Chip version arrives in an “Upside Down Survival Kit” with a T-shirt and recipe card, and it’s only sold online for $19.87. Each oversized bar is a sweet, salty throwback loaded with soft peanut butter and crunchy chocolate-studded coating that channels after-school snack vibes. Supplies are limited, so fans might want to grab a box or try the DIY recipe before this retro treat disappears again.