S.T.
I am in two play groups on Meetup.com that cater to your particular area. I am in one that is Centennial and South Aurora (though it's not confined to just those residents), and I know there are ones for Parker too. I have loved meeting other moms and having the group be larger, there are SO many activities to choose from, and you are always meeting new moms and their kiddos. Check it out! It's great!
put "play groups near 80134" in the search box and you'll find there are a LOT to choose from!