Hi,J.. I teach parenting and am a licensed family therapist. One of the classes we teach is called "Faith Parenting," and it's about having faith in your children's ability to learn from their own mistakes, having faith in them to be able to explore, be curious, and learn competency without parents' fears getting in the way. Does that mean we put them in harm's way? No, but it does mean we ask ourselves why am I saying no? Am I stopping him from learning something?
Rather than discipline him for doing what all children do once they become mobile, which is climb, go over, under and through things, flush the toilet to see how the paper goes down, unroll the toilet paper roll, climb up the slide backwards, etc., could you step back and observe how he is learning? You could set a limit and allow him to unroll the toilet paper roll one or two times if that's what he wants to do, so he gets to see what it's like and "burn up" the drive to do it.
I think parents overdo it with the baby-proofing a lot of times (most of us did not grow up with rubber bumpers covering every piece of furniture). Maybe if you thought of your job being more like a gymnastics coach who spots the gymnast, that is, stand nearby in case needed to help break a short fall, etc., your son will wire in competency and confidence. You'd be surprised how much more often they don't fall and get very agile when we don't interfere. If we tell our child, "don't do that! You might get hurt! Or you might fall!" they never get to learn what they can do. If we have faith and trust in their ability to learn, we can help boost their self-esteem and motor skills abilities. If a child tries to go under something and bumps his head, he just learned something and chances are, the next time he won't do that the same way. If we stop them before they bump their head, they never get to learn from experience.
Making mistakes is the greatest teacher for all of us. Sometimes moms need to learn this more than dads, but just see what it's like to witness your son's explorations and curiosity--in fact, you can even join him. If he spills milk on the floor by accident, rather than reacting, talk about the pattern the milk makes and give him a paper towel to help you clean it up without making a big deal of it.
The good thing about babies and toddlers is they are built low to the ground and their center of gravity is such that they don't usually get hurt if they do fall or get a bump. Even when they do get a boo-boo, if we don't over-react and we check in with them to see if they're okay, they usually rebound quickly and are ready for the next adventure.
This way of parenting makes life easier for you, too. You can be less hyper-vigilant and more relaxed because your child is learning for himself with you as a witness and cheerleader!
I hope this helps. Good luck!
S. L.