You can try YMCA of Tsim sha Tsui. As I know that quite good.
Give you some details of the course,
i.e. Playtots
Instruction : English
The course is designed to provide the child with socialization opportunities with children of the same age (1.5 to 3 years) as they learn English together. There will be songs, games & various creative activities to encourage and develop your child's interest & participation.
Remarks : one parent or guardian is required to be in attendance for sessions with the 1.5 to 2.5 years old.
Sessions : 10
Fee, YMCA member $1,220
Non member $1,280