Willing to fail?

Insanity is often defined as doing the same thing over and over and expecting a different result. Suppose you don't know what to expect? Should you try, or is that risk of failing too much of a risk for you? Someone wrote, "As soon as you are willing to fail, you can accomplish anything." I recently heard about a team-building exercise to build a structure to hold a marshmallow (www.marshmallowchallenge.com). Kindergarten kids scored better than MBAs. Why? Because the kids were willing to try something, and if it failed, they simply tried something else. MBAs wanted to plan and create the perfect solution, only to run out of time when that solution failed. Maybe Kindergarten really was the source of all we really need to know to be successful. We weren't so afraid to fail then.