Learn Mandarin after school

My daughter is going to attend k1 in an international school (all eng.) the coming sept., and i am looking for a good
mandarin
playgroup/learning course after school in hk island,
say 3/week, about 1 hr each, afternoon lesson.
so as to provide her some environment of mandarin
speaking just
like some of the kindergarten provide.(As i know some of the international kinder provide half hour mandarin a day, and some 2 - 3 times a week)
Preferably more lively kind of running, and more children
together, like a playgroup, not too academic........
Do any mami have information
Thanks a lot!