I don't know how close you want to be to the GW but we are in Ridgewood and it's VERY kids-friendly. There are so many things to do that you literally run out of time (or money
) to do them all. The town does lots of stuff. The local library is great, they have tons of classes. The local Y is really good. We also have a great pool in town, which is perfect in the summer. As it gets warmer, the parks get filled with strollers.
We also know few people from Tenafly (which is closer to GW) and they say that it's great for kids. The YJCC in Washington Township offers tons of classes for kids.