Any ideas of places to go, things to do in the Tacoma Area?
The Children's Museum puts on a program called Play to Learn every day of the week in various locations in Tacoma and surrounding areas (Gig Harbor, Puyallup, etc). Its free and lots of fun. There are always lots of babies, toddlers, and preschoolers there. They supply age appropriate toys and they have crafts and circle time. It can get quite crowded though, so be prepared for that possibility.
If weather permits, my kids love stroller or sling rides on Ruston Way. Its a beautiful walk and lots to look at for the kids.
The Pierce County library offers specific programs for different age groups. I take my kids to the Preschool Story Play time. But it sounds like you guys would really enjoy the Prewalker programs. Here's a link to their schedule: http://www.piercecountylibrary.org/files/library/winter-2011-story_001.pdf