Is there a question about age? Did you potty train your children? Or w…

Is there a question about age? Did you potty train your children? Or what do they call it, we say "to potty train" a child, well, sitting with them over the toilet and doing pee-pee-poo ? I hope you understood me. My mother-in-law says that then he won't go to the toilet, but if you "to potty train", then in the future he will ask himself. Or can you teach him on the potty right after diapers?