It really does depend on what nursery you go to. Most tend to be schools that have a nursery (pre kindergarten) that will take them from the age of 3 as long as they are out of nappies. The cost will range from 150k per year to 600k Baht depending on the school. You may find cheaper but it won’t be of an international standard. They do have playgroups for 1-3 year olds whereby you stay for a few hours with your child and they do various activities and learning games, that is if you are just looking for a place to socialise your child. If you want baby care (under 3), you’d be better off looking into a full-time nanny. 15k Baht a month would cover that. You might choose for the person to live-in and provide meals as a part of a benefits package.