My family lives outside of Philly (on the NJ side) and while we love the Please Touch Museum, we were completely and utterly smitten with Port Discovery Children's Museum in Baltimore! My 3 yr. old is still talking about our trip which was in October. I'm so glad you loved Philly! It's one of my favorite places!
If I were a kid I guess I'd live there)
My daughter, who is almost 24, still fondly recalls her visits to the Please touch Museuum when she was a little kid.