Sleeping

How is it that Brady (and probably most babies) can sleep anywhere, anytime and through anything? Not to mention how fast they can fall asleep. We drove in to my parents house this morning to babysit my sisters kids and this is how I found Brady when I opened the back door: Dead asleep still holding his toy. I was amazed he even fell asleep because the music was on and just minutes before we arrived he was talking and laughing. He looks HUGE to me in this picture. It's almost time to upgrade him to a bigger car seat. Weird.