Fresh air, fun science and a chance to help the Homewood Science Center continue to grow. That's what Walk Walton, a PopUp Science fundraiser, has to offer area residents from noon to 3 p.m. Sunday, Oct. 23. Walk Walton will be the HSC's first fall festival. The event will be an opportunity to escape into the beauty of autumn on a guided nature walk or stroll the trails on your own with a self-guided tour through Izaak Walton Nature Preserve, 1100 Ridge Road in Homewood.