Ages 7–10. Learn about how communities are working to implement climate change solutions, then work to design new solutions. Adults can head out into Spring Lake Park to enjoy kid-free time. $10–$12. Parking: $7 or free with a Regional Parks membership. Two sessions: 11 a.m.–noon or 1–2 p.m. Environmental Discovery Center. 393 Violetti Rd., Santa Rosa. Registration required: tinyurl.com/4rkk6pyk.