summer activities for english speaking 12 year old (Guangzhou)

I am an American living in Guangzhou. My 12 year old son from a previous marriage will be spending 2 months with me this summer June 12-August 12. I would like to find some activities for him for the summer. Sports, Computers, Art, you name it, I am open to any and all possibilities that may help me make his visit to Guangzhou more interesting.