I send my child to the play nest classes - it's an adult accompanied program that starts from 6 months to 18 months. The classes are twice a week on wednesdays and Fridays from 1.30-3pm or from 3.30-5pm. They also have a weekend option. The fees are $1089 per term. Each term is about 11 weeks. There is also a refundable deposit of $200 and a $50 registration fee (unless you have a UOB card, then the fee is waived off).
It's not bad. 90 mins. First 20 mins is free play, then it's songs, then it's story time, then art, then snack time and then outdoor play time. Everything is done in Mandarin. 2 Teachers in the class with about 3-4 toddlers and their caretaker. Seems like many of the kids start at 6 months and they are actually able to follow instructions in Chinese. :) This is my little one in one of the classes
You can actually sign up for a trial for $29 and check it out yourself :)