Looking for a Playgroup...help?

PLEASE HELP ME FIND A PLAY GROUP!?  How did you locate yours??

Hi - I've got 2 girls and live in the 'burbs (Flourtown/Ambler/Chestnut Hill/Abington)

my eldest will be 3 this June and is DYING to make new friends...everyone in our neighborhood goes to school and she's still at home with me all day.  Now that #2 is 6 months and on a regular schedule I promised myself that I would get us all out of the house for the big sis.