Is a great place to hang out around BWI and it's only a stones throw away. Very easy to find.
Zagat Survey's U.S. Family Travel Guide and Parenting Magazine ranks Arundel Mills as one of the top U.S. family sites to visit!
My DH and I were just there on Saturday for a day trip and we also went there when we flew out of BWI last October.
Here's a link so you can check it out but I'll warn you, the website DOES NOT do the place justice.
Arundel Mills Mall
The place is huge so you should be there for awhile and it has all these different themes throughout. One section you walk through is like your inside a giant pinball machine, one section is like walking down a bowling alley lane, one section is set up like a meadow with huge fireflys and dragonflys in crazy colors like pink and turquoise and they pipe in sounds from a meadow, one section is like walking through a park and they have telephone wires strung across with little birds on the line. It's really alot of fun (for a mall). It has a huge Muvico Egyptian 24 Theaters. The outside is designed to look just like Egypt. They even have a
Medieval Times there, like in Orlando, but that is definately NOT free or cheap. We've never done it before.
They also have a Bass Pro Shops Outdoor World there that is huge. We are not an outdoorsy type family but we always have alot of fun here and it's a nice place to pass the time. They have a
huge aquarium where you can sit and watch the fish. They have a shooting arcade and the theming is just great.
Oh, and there are stores here too.

Believe it or not we didn't buy a thing when we were there Saturday. It was just a fun themed place to hang out.
And if you get there and find you've forgotten something. There is a
WalMart and Costco's and several other stores right outside the mall on the mall property.
Hope this helps, have a great time whatever you choose.