You should check out the Coddling of the American Mind by Jonathan Haidt and Greg Lukianoff. While it’s one thing when they are a literal infant, as they become a toddler and into early childhood there will be things they should be doing on their own that will more than likely injure themselves. In order to grow and develop they need risk. The problem with risk is that sometimes they will sometimes get hurt. However it’s the only way they can truly learn and grow, and it’s also why they have rubber bones.