I ended up here because I thought my 10 year old brother would like it. Turns it these little cars are just as fun as I remember them as a kid! I didn't get a chance to drive the big cars (16 and older) but I was there to hang with my brother and we bought the hour pass; times a wasting.
anyways, you have a multitude of options. We ended up paying the 20$ for the hour drive all you can. I can see this is a good deal if it's not real busy. Basically you can ride as much as you want and not wait in lines. You can also buy tickets for individual rides. The carnival rides were a little weak for my tastes, but I had fun on them with the 10 year old.
I recommend getting there early during the summer as things heat up real quick. Overall the place isn't going to win any awards for awesomeness, but it's a fun place to take a kid so be one yourself and rev that engine!