This article caught my eye. In particular, I thought this paragraph most interesting:
But letting kids explore -- at the cost of a few scrapes and cuts -- builds character, self-confidence, resilience, and self-reliance, says Wendy Mogel, Ph.D., author of "The Blessing of a Skinned Knee." Boys, being natural risk takers, may need encouragement to slow down a little, but maybe girls need to be encouraged to take more risks. Look for opportunities for your daughter to jump off a wall, swim in the deep end, or try the bigger slide.
We tend to be quite protective of Muffin, trying to avoid her getting scrapes, bruises, etc. Maybe we shouldn't? Not that I'll be encouraging her to go break an arm or leg ever, but a scrape here or there isn't such a biggie I think. (others at home might differ in opinion…)
Nevertheless, food for thought.