Learn how to save rainwater in a recycled plastic barrel. The collected water may be used for plant beds, potted plants and vegetable and herb gardens. In this free class, the group will learn how to make and set up a rain barrel. An optional rain barrel may be purchased for $25 with advance registration. 9 to 10:30 a.m. Registration required. Brooker Creek Preserve, 3940 Keystone Road, Tarpon Springs. (727) 453-6800; www.brookercreekpreserve.org.