My son, (7years old) is having Cantonese private tuition at home once a week, the teacher is from HKLLC (HongKong Language Learning Centre, Tel : 2385-5331). I'd like my younger son (18months) to learn as well, but after checking, need to bring him over to the centre, so pending at the moment for I think I'll do it when he's 2 years old. You may try to contact HKLLC to check furthur.