rainy days means mostly indoor playrooms or we wander around malls like IFC, Pacific Place etc...We also do long extended market trips where my son can look at the foods and walk around. If you know anyone who belongs to a club that's your time to ask them too! Aberdeen Marina Club and American Club have great indoor playrooms - have never seen HK Country Club's. Just know they have an outdoor playground.
When the rain finally lets up to a light drizzle, we get on our wellies and slosh around too!