Not potty training but couldn't see where else to ask. My 3 year old is potty trained and starts school in September. At what age do boys start to wee standing up? I don't want him to start school and not be able to if all the other boys do. But we tried it once and he struggled. He wasn't really tall enough so didn't have the angle to aim in properly. I know they don't have to but just want to know whats usual.