Our little bruiser

I felt good leaving Lily in daycare that morning. She stood right up with these plastic bottles full of different colors of water and sand and started playing away. I have her a kiss walked to the door and waved bye and we blew each other kisses and she gave me a beautiful cheesy smile. Shortly after Lily had 2 different incidences within 45 minutes of each other. One involved another childs teeth making imprints in Lily's forearm, and the other was a standoff between Lily's face and a concrete floor. Neither caused any permanent damage obviously, and I know they are the first of many more war wounds to come. I know I can't protect her from everything, but how do they grow up so quickly?