I've always loved going to Scidmore Park since I was a kid. They have recently made some improvements that makes it even more enjoyable. They added a great petting zoo! You can pet llamas, goats, rabbits, birds, turtles, etc... They have a nice barn with turtles, birds, and other creatures in it.
There are nice covered picnic areas here as well as a playground. The only thing I don't like is all the goose poop!