Here's a list of good Chinese enrichment classes in Singapore.
http://sg.theasianparent.com/chinese-enrichment-classes-for-kids-which-class-is-best-for-your-child/
- Tien Hsia Language School
- HUA Language Centre
- Berries Language Centre
So far, I've heard very good reviews about Berries because they teach Mandarin in a very interactive way.
I would like to recommend Berries World for young kids/preschooler as they learn through a fun way like songs, role plays and story telling. For older children, Tien Hsia is good as it provides a formal learning.
Anonymous