Which of these famous products was originally marketed as wallpaper before finding success in its current use?

Throughout history, many revolutionary products evolved in unexpected ways due to consumer feedback, marketing challenges, or happy accidents. Some of today's most iconic inventions were originally designed for entirely different purposes before clever marketing pivoted their trajectory. Test your knowledge about how marketing influenced the evolution of famous inventions and discoveries!

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Bubble Wrap (originally designed and marketed as textured wallpaper in 1957)
Post-it Notes (originally marketed as decorative wall borders before becoming office supplies)
WD-40 (first sold as a decorative wall coating before its lubricant properties were discovered)
Play-Doh (initially marketed as wallpaper cleaner before being rebranded as a children's toy)