My son Myko is already 2 years old last month but still have to wear diaphers. He don't tell us if he need vee vee or poo poo. In summer, if he have not wear anything and his baby toilet is just next to him, he still don't sit down there to vee vee or poo poo. You have to clean the floor! He also like to wear diapher and always request "ma ma 片片, ma ma 片片!". What method you use to train 英賢?