Learn how fairies use natural elements to build their homes, then build your own out of scavenged materials. 10-11am, South River Farm Park, Edgewater, RSVP: 410-222-1978.

Share your passion and knowledge of plants and animals as you traverse about 1 mile of the Forest Trail. Topics include the history of North Tract, the role and importance of pollinators, the ecology and biodiversity within a forest habitat (ages 10+). 10-11:30am, Patuxent Research Refuge, Laurel, RSVP: 301-497-5887.

Program begins by examining a Peale painting, then a workshop en plein air with Maryland Hall teaching artists. 10am-12:30pm, Hammond-Harwood House, Annapolis, free, RSVP: 410-263-4683 x10.

Families learn how to paddle a canoe and explore the Patuxent River (ages 7+) 10am-2:30pm, Jug Bay Wetlands Sanctuary, Lothian, $10, RSVP: www.jugbay.org.

Learn about the earliest forms of pottery and the indigenous culture that produced it thru demos and hands-on learning. 10:30am-12:30pm, Historic St. Mary’s City, $25 w/discounts, RSVP: [email protected].

See this all-member show which reflects our love affair with coastlines in the Mid-Atlantic and beyond as represented in paint, photos, pottery, jewelry, glass fiber, and woodwork. Thru June 26. 11am-5pm, Tue-Sa, noon-4pm Su, North End Gallery, Leonardtown: northendgallery.com.

Celebrate local music at this homegrown music festival featuring over 30 bands on 4 stages and nonstop tunes; Food and drink vendors on site; proceeds benefit local nonprofits. 11am-8pm, Back Creek at the end of Second Street, Eastport, $30 w/discounts: eastportarockin.com.

Discover the world of the railroad with games, crafts, and storytime. Noon-4pm, Bowie Railroad Museum, 8614 Chestnut Ave., free: 301-809-3089.

Join Jug Bay staff and naturalists for the first blitz at the preserve; Volunteers work in expert-led teams in 3-hour shifts to find, identify, and record as many species as possible during the 24-hour period. No prior training or experience necessary (ages 8+). Sa noon-Su noon, Emory Waters Nature Preserve, Lothian, free, RSVP: jugbay.org.

Toy boat building, sponsored by the Patuxent Small Craft Guild, has been part of the museum for over 30 years; ideal for ages 5+, activity takes place outdoors in the Corbin Nature Pavilion. 1-4pm, Calvert Marine Museum, Solomons, museum admission plus $2/boat: calvertmarinemuseum.com.

Calvert Library presents a free family concert with Grammy-nominated musician and author Pierce Freelon, sign up for the reading program, dine at food trucks, enjoy kids activities, visit the Fishmobile and the bookmobile; free t-shirts. 2-6pm, Annmarie Garden, Solomons, free: calvertlibrary.info.