Hi there, I am sure there are people out there that know more then me, but we just got back from VB with a 3 year old.
There is a varitey of planned activies for children of all ages at VB, they provide listening every day (infact there was a schdule on our door every night.) Some there are charges for, some are free. For the older kids there are a few that require supervison, some that don't. I don't know about "kids clubs" like at the WDW resorts where you pay for the hour for eveng childcare, since our DD was too young for that.
I do know they have a number of activities for all ages through out the day. The campfire at night is fun too.