day 3 of 3 days toilet training

we're supposed to do a morning and afternoon outdoor trip today but i've been waiting for him to go in the morning as he usually does but he didnt do any at all today. so i was just able to take him out in the afternoon. we went in the playground for 1 hour without any accidents. he peed before we left and after we were able to come back home. his dad wanted to go to the mall so i dressed him up with some training underpants. i am surprised that he did ask me to go to the washroom while we were in the mall.but since i still had make a dash to the washroom, he already peed a little on his training undies but he still peed on the toilet. we only had few pee accidents today but he is still not telling me if he wanna go. i always have to ask him still.i dont think he would be fully train anytime soon but im not giving up still. i remember reading somewhere that it takes 21 days to make something as a habit so probably my little boy needs more than just 3 days of training..