Parker is turning 2 on Saturday. We are trying to plan something fun, but not too expensive to do with him to celebrate. We thought about going to the Columbus zoo, which is about a 2 hour drive from here. Has anyone been there and is it worth it? Our worry is that it's only open 9-5 and it's huge. Is that enough time to see everything? Or see as much as a 2 year old and his 3 year old brother can handle? Or does anyone have any other good ideas? Thanks ladies!