Earth Day April 24, 2010 9:00 am - 3:00 PM Events start at 9 am with a fundraising pancake breakfast by FORHANC (Friends of Roseville’s Harriet Alexander Nature Center). (Cost is not specified on their website.) Family-friendly free exhibits, activities and entertainment run from 10 am until 2:30 pm when birthday cake in celebration of the 20th anniversary of the nature center will be served. The Harriet Alexander Nature Center turns 20 this year. Reminisce about the first two decades and affirm the commitment to quality environmental education. Explore fun and informative exhibits for earth-friendly living and enjoy such Earth Day favorites as the walking parade, crafts and games and the annual tree planting event.