Hi, if your office is in central, you may consider woodland.
Woodland is the international preschool, and there are many in HK side.
My son goes to full day class which is from 8:30 to 15:30, so he leaves home around 8:10 and comes back around 16:00, pretty long compared to other kindergartens. There are some german kids. Only that kinder starts to accpet kids from 2.8years old.