What fun thing to do for our 4 yr anniversary in Austin Texas?

This is our last anniversary, October 15th, before our wedding this December and we want to do something fun instead of romantic. We aren't into the club scene. We want to do something along the lines of racing things or bumper cars or something carnival like or actively fun. Is there anything in the Austin or San Antonio area that has anything that we're looking for?|||go to HAMILTON POOL. It is so beautiful there. take a camera. and perhaps some rubber boots.|||central markert shoping eat out