All manner of boats are visible on the ocean’s horizon or in the Russian River, sparking the curiosity of child and adult alike. Kids ages 6–12 can learn to build their own boats at the Science Saturdays: Boat Builders class at the Discovery Center at Spring Lake Regional Park in Santa Rosa. Participants will use random tools to construct their mini vessels and then will test how well they float. The class will be held on August 13, 11 a.m.–noon or 1–2 p.m. It’s free but registration is required: tinyurl.com/2p9advfv.