If you have ever spent much time at a playground you’ve seen that small children love to slide down slides, and that they also love to climb up them. Playground slides are not designed to climb. They are steep and slippery, and have no hand holds. And that is precisely the attraction for little ones -- the challenge.
We’re all born with the desire to seek out and overcome challenges. For the better part of human history, it’s what has kept people alive. And it has led to a steadily continuing increase in our standard of living.
