My son is 2 and a half.
Recently he has started writing letters in the right order to make words but he puts all the letters on top of each other so in the end you wouldn't be able to see what it says -it is only from watching him write that I can see he has made the right shapes for the letters and words he says.
Should I just leave him to do this and he'll work it out himself or should I be correcting how he holds his pencil and showing him where to write his letters? Basically do I teach him or leave him to it? As with reading/counting/adding I would only do it as long as he was interested.