I talked to 70 parents who raised highly successful adults—here's the 'rare' skill they all taught their kids.

As parents, we all want to raise confident, fearless, and resilient kids. But where do we begin?

For my book, "Raising an Entrepreneur," I talked to 70 parents who raised highly successful people. When I asked them what skills they taught their kids at an early age, there was one in particular that they all agreed on: curiosity.