Borderland Park in Easton, MA is gorgeous. Fall is definitely the best season for visiting. There are many levels of trails, some are definitely not kid friendly. But the milder trails are great for kids. A jogging stroller works fine on these trails, and kids will be entertained by the many dogs that are usually there. We've seen horses plenty of times too! There are big stretches of lawn that are great for Frisbee, playing catch or just letting the kids loose to run around. The lake is gorgeous too. There is a cute little stream and bridge that is just perfect for playing Pooh Sticks, or just for observing the water life.