Where can i take weekend classes in psychology in singapore?

i finally realise that i wanna become a child psychologist but am already taking a diploma in life science.i can't change courses anymore cos i am in my second year already and my gpa sucks (i can't help it). so, i am thinking of attending seminars and weekend classes (i'm busy to the max on weekdays) and gaining a recognition certificate to appeal for the course in uni. i searched the almighty google but could'nt find any. please help me!!! i'll be eternally grateful!!!!!