What is an estimated time to get a good look at what is available here?

Everything, with the holiday crowd, if you want to see the trains, Science city, the exhibits, maybe walk across the Link to the Aquarium and Crown Center...you could easily spend an entire day or 2 there

Few hours minimum

If you have kids, plan on at least a half day if not a full day. Lots of things to do. For adults, a half day is more than enough to experience everything.

Probably half a day or longer

1pm