Top 10 Simple Inventions that Millions Have Raised

The simplest ideas are often the best. And they can also provide baking with money. Think of the 'Slinky', also known as the traploper, who could have thought that a simple metal spring would become so popular as a toy? Or even easier, the frisbee, a simple round plastic disc. The following ten simple ideas are almost all 'accidentally' conceived, and the inventors have delivered millions.

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