There are many centres that provide enrichment programs. You need to know what you really need for your child. There are Shichida Method - focus on right brain learning, Julia Gabriel - focus on drama play, Genius Space - focus on progressive methods right and left brain, and there's also my Growing Up Gifted and etc.
Maybe you wanna narrow down to your needs so that we are able to recommend you as accordingly. The parents here are all very helpful and will assist you along the way..