What is wrong with using tissues?
My mum told me that when I was little and had a snotty nose, she would hold a tissue up to my face and say, "Blow." And I would sniff. I guess it is hard to teach kids some things. But apparently I was the easiest to potty train out of the four of us. Once I was put on the potty to go, I wouldn't wear nappies and always went to the potty instead. My mum was pretty happy with that. But my sister wet the bed for years.