My child, at his last doctor's appointment, was 13 lbs and some change. That is smaller than some kids are born! But, he is a strong lil booger! Our little dude is already pulling up on things and wobbling around on his toes... with some assistance, of course. He moves really fast... we have to keep an extra special eye on him or he will run into another room! Okay not run, but... well, scramble on all fours.
My wife, Laura, made a bet with me, not sure of the stakes yet, but made a bet that he would be walking by nine months at the rate he is going.
Stay tuned!