Julia Gabriel, it has two locations, Forum Shopping mall by Orchard Rd, and in the "suburbs" Evans Rd. This is a very popular place among locals, waitlists can be long
Little Mandarins, at Demsey Hill, popular among expat kids.
If you kids already speak Mandarin, Julia Gabriel might be better.
We have tried both, we come from Europe, my daughter wasn't happy at JG, because she didn't understand anything

, and the local kids didn't seem to play with her
She loves Little Mandarins.
You can have trials in both institutions.