Does Planet Money’s game pass the shelf test? We go undercover to find out

The process of launching a new product in big-box retail relies on strategic shelf testing to capture consumer attention. By placing prototypes in physical stores, companies evaluate how their packaging performs in real-world environments, such as being shoved behind other items or placed on lower shelves. Key metrics include the "three feet, three seconds" rule, which dictates that a product must grab a shopper's attention within three seconds of them being three feet away. Effective design requires clear, legible branding and intuitive packaging that explains the product's value proposition without requiring excessive consumer effort. These field tests help identify critical flaws, such as poor kerning or confusing back-of-box descriptions, allowing for necessary adjustments before a full-scale retail rollout. This collaborative effort between the Planet Money team and Exploding Kittens co-founder Ilan Lee demonstrates the practical, often chaotic, reality of retail product placement.