'Hello Twelve!'

For a few months now I've been counting the stairs as Tom and I climb them. Initially he would have nothing to do with the number four but has finally accepted that its deserving of a place (usually just after three but that's not a given).

Tom appears to be developing a semblance of understanding and seems to follow that there is 'one' and 'more than one', the latter described as 'one-two-three'. As far as the stairs go though, although he happily repeats the numbers as we climb and even says the next in the sequence, I know his grasp of their meaning is not quite there when he cheerfully greets the top step - 'Hello Twelve!'