Which of these famous products was originally designed for a completely different purpose than what made it famous?

The world of inventions is filled with fascinating stories of product designs that revolutionized industries and everyday life. Some designs were the result of careful planning, while others emerged from happy accidents or were repurposed from their original intent. Test your knowledge about the development process and original intentions behind some of the world's most impactful inventions!

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Play-Doh was originally created as a wallpaper cleaner before becoming a children's toy
The Slinky was intentionally designed as a toy from the beginning of its development
Post-it Notes were developed specifically to serve as removable bookmarks
Bubble Wrap was initially designed as packaging material, which remains its primary use today