Turns out the park is fun, too.
Powder Mills Park Fish Hatchery is located at 115 Park Road in Pittsford, NY. There is a gazebo with picnic tables by the fish pools, so you can bring lunch or snacks.
Parking is free, and the park is stroller-friendly. If you have older children, there are some trails through the woods that can be fun. We started out on them once, but I quickly decided that we needed one adult per child at this stage, with a 2 1/2 and a 5 year old. When you walk back toward the parking lot, before crossing the bridge over the creek, follow the creek to the right into the woods and you'll see the worn trails. That part is definitely not stroller-friendly.
If you are looking for a low-key place to take the kids and get some fresh air, Powder Mills Park is a great place. If everyone still has energy to burn after visiting the Fish Hatchery, there are some other areas to stop along Park Road and visit more of Powder Mills Park.
Enjoy, and as always, thanks for reading.