Kindy is not compulsory in HK so it's totally up to the parents. Many parents would send their kids to kindy for similar reasons to the ones described above for pre-nursery. With kindy, the added factor to think about is getting into primary school. Since many kindies are linked to primary schools, parents feel their children have a better chance getting into that school and hence choose to send their kid to kindy. I am not keen on pre-nursery for my son but will apply for kindy because of the primary-school thing, plus I think it might be easier to ease him into structured school by going to kindy first. Where you send you kid is also up to you and of course, whether your kid gets into a kindy near your home. I would choose an average/decent kindy near my home over the best schools that would involve travel. Other parents feel its important for their kid to go to the best school even if it involves travel. If you're renting you can also opt to shift house to be closer to your kids school, especially if you want your kid to be in primary school in the place.