I just observed Christopher crawling over to Leah’s closed bedroom door, attempting to kick it open, and then when that didn’t work attempting to head-butt it open. When the door stayed shut he proceeded to put his face down on the floor and cry, throwing a little tantrum.
Leah heard him and opened the door. He looked up at her, and immediately turned off his tantrum and his whole body shook with excitement as he giggled.
One of my favorite things about motherhood, now that I have two, is how much they love one another.