Not too much for adults without children.
Other then the food, parking, and tickets being rather expensive it was alright. Not too much fun for me and my boyfriend (we're 22) There just seemed to be too many pushy, overexcited children, and its not a very big Museum. There were only a few exhibits that actually interested us and the permenant exhibits seem rather old. I wouldnt recommend planning to eat there for lunch, they dont have much to choose from and its rather pricey for what you get. It was a nice one time trip to see what it's all about.. but I dont think I'd go back unless they had a new exhibit that really interested me.