Growing up in a group home, and with an undiagnosed learning disability to boot, the odds of success were not on my side. But when I joined the high school football team, I learned the value of discipline, focus, persistence, and teamwork - all skills that have proven vital to my career as a C.E.O. and social entrepreneur.

Our education system is increasingly embracing a black-and-white way of thinking, in which 'learning' and 'play' are diametrically opposed. 'Learning' is the serious stuff that happens inside a classroom and can be measured via multiple choice questions and a No. 2 pencil. 'Play' is frivolous, fun, and worst of all, optional.

Only one in five children in the U.S. lives within walking distance of a park. Many more lack access to a quality early childhood education that provides ample time and space to play.

As parents, we need to send our kids back to 'old-fashioned' outdoor summer camps, which have been on the decline as the demand for sports and academics-based camps has risen. We need to fight budget cuts to public parks programs and resist closures of public swimming pools and playgrounds.

We are raising today's children in sterile, risk-averse and highly structured environments. In so doing, we are failing to cultivate artists, pioneers and entrepreneurs, and instead cultivating a generation of children who can follow the rules in organized sports games, sit for hours in front of screens and mark bubbles on standardized tests.

In an era of parental paranoia, lawsuit mania and testing frenzy, we are failing to inspire our children's curiosity, creativity, and imagination. We are denying them opportunities to tinker, discover, and explore - in short, to play.