Errrrrrrrr.
I was about 3.

I did used to cheat at dominoes by hiding them in my nappy though. Not sure quite how that works but I was 3.
( TFD is sporting this season's finest necropants, Tue 12 May 2009, 18:18, archived)

So you grasped basic counting before the art of not shitting in your own trousers.
This is an interesting revelation about human evolution.
( Dr. Shambolic je suis charlie, Tue 12 May 2009, 18:23, archived)