The debate rages about formal or informal learning. Here is an excellent article on the mismatch between how we really learn and how organizations - including schools - see learning.
For most of us, we learn all the important lessons before we go to school. We learn how to talk. If we were exposed to more than one language before 4, we would learn a second or even a third language easily. We learn to walk and to have eye, hand foot coordination. We learn who we are and where we fit. We learn the rudiments of social life. If our parents encouraged us we would already know how to read and more importantly would like reading. We could acquire a host of skills if we had the opportunity.
Friends of mine with wondrous children who observe the world and who find the wonder in it have told me that they worry about when they go to school and have all of this sense of being an explorer knocked out of them