Kids nicknames

We call our nephew "xiao dong gua" and he happily responds to it even when he is less than one year old. He will turn his head to look at you when you call him by his nickname. I even got worried that he may mistook that for his name. Thankfully, he also responds to you when you call him by his name. Now that he is talking, he refers to himself by his name but would still respond when we call him by his nickname. :)