REI in general: In brief, we're huge fans. In fact, we're REI members which means that we get a 5% discount on our purchases via the dividends program. If you end up loving REI as much as we do, check into this great program. They treat their members right! They have great brands, both designer and own-brand, the staff is very knowledgeable, and they don't push sales. The sporting goods competitors simply cannot "compete" with this store--unless you're talking purely price.
This store: they have a climbing wall along the large window so you can get a view of the Mon if you climb up. My daughter tried it at age 2.5. That was a little young. :) Maybe this year!
The biggest downside for anything in this area is parking. Ugh. I usually find a meter in the middle of the week, but on the weekends, it's parking garage city. If you're okay with a little walking, try the side streets adjacent to the shopping area and walk.