good group for 14 month old this autumn?

[twinkle5]

Hi, I am looking for a structured group / activity for my 14 mo old ds starting in Sept. Obviously it is as much for me as it is for him! Once a week is fine, and would rather not pay Gymboree type prices as in reality he would be just as happy playing with sticks in a sandpit!
Any suggestions? I am at Fiveways btw.