After weeks of research, and a matrix chart involving everything from price to amount of time children are occupied, to travel time between locations, we've decided on summer activities for our children (7 and 9).
I had a hard time finding a good listing, so thought I'd post my notes. Sorry, you'll have to google the exact addresses, as I'm not THAT helpful!
Treasure Island Surf Camp- surfing
Children's Technology Workshop- computer- related stuff- game design, animation, robotics
ESF educational solutions- sports camps and sports clinics
Faust international- theatre and creative writing
Chameleon workshop- visual arts/ arts and crafts
Kid's gallery creative arts- performing and visual arts
City Plaza Ice Palace- ice skating
South China Athletic Association also seems to have classes and such, but I can't figure out what language they teach in, and haven't had the energy to call.
YWCA- seems to have classes/ camps, but I can never find anything on their website (again, the energy problem- I know, pathetic)
thelist.com has a good listing of all sorts of providers (under family, sports, classes)