Here’s a thought exercise. How many of the products and services that you use every day were created or first used primarily by people under 25?

A few will spring to mind, Facebook the biggest of all. Yet the vast majority of your most-used things weren’t initially popular among teens. The iPhone, the iPad, the iPod, the Google search engine, YouTube, Twitter, TWTR -1.59% Gmail, Google Maps, Pinterest, LinkedIn, the Kindle, blogs, the personal computer, none of these were initially targeted to, or primarily used by, high-school or college-age kids. Indeed, many of the most popular tech products and services were burdened by factors that were actively off-putting to kids, such as high prices, an emphasis on productivity and a distinct lack of fun. Yet they succeeded anyway.

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