Harrison--though he is the youngest--has a natural instinct to protect his siblings. If he sees that something is "scary", he'll make sure that he tells his brothers to stay away from it!
He's quite a responsible toddler...but then two minutes later...
He's doing the same thing!
I genuinely believe that having older siblings has made Harrison subconsciously learn to care for the safety of others...Yes, he's still a toddler, and gets himself in PLENTY of trouble! But his older brothers, shielding him from danger, have taught little, 2 year old Harry to care for them in the same way--by helping him through the rough patches in the "forest", bundling him up before going outside in the cold, watching him closely every time he's with them, and by simply adoring him.