I will start by saying that my three year old doesn't meet any developmental milestones, he can't sit unaided, can't walk, talk or even roll over but today, when I put him on the his mat on the floor for a bit of wiggle time he managed to work his way off and move himself about 2m across the floor! I have no idea how he did it as I had left the room to make a cup of tea and came back to find him not where I had left him. I have no-one at home to share this wonderous achievement with but would love to share it with someone.