There's the Corning Museum of Glass; it's a road trip but well worth your time.
In the spring take a trip to the Caledonia fish hatchery. Kids like to see and feed the fish.
Drive to Mendon Ponds Park and see how many deer you can find. There's also a bird feeding area off the southern entrance. The chickadees will light in their hands to feed. They'll screech with terror or glee but they'll remember the time they fed the birds.
Grab your rain coats and visit Cummings Nature Center off the East side of Honeoye Lake.