Take the Narragansett Bay Lighthouse Cruise aboard the Sea Princess for a scenic tour of the lighthouses of the upper bay, including the newly restored Plum Beach Lighthouse, above, Dutch Island Light, Jamestown Light, Wickford Light and others.

The Providence Journal / Bill Murphy

Audubon Society of Rhode Island Program. 949-5454, ext. 3041; www.asri.org.

•Thu. Narragansett Bay Lighthouse Cruise aboard the Sea Princess. Scenic tour of the lighthouses of the upper bay, include the newly restored Plum Beach Lighthouse, Dutch Island Light, Jamestown Light, Wickford Light and others. Departs from the Wickford Town Dock, end of Main Street, North Kingstown. 6:30-8:30 pm.

•Sat. Butterflies of the Newman Refuge, Smithfield. Spot swallowtails, fritillaries, painted ladies, sulphurs and other butterflies in a guided walk through one of the Audubon’s newest refuges. Sat 10 am-12:30 pm. Suitable for novices and experts alike. Audubon guides. Meet at Audubon headquarters, 12 Sanderson Rd., Smithfield. Bring water, sun protection, tick repellant. Rain date Sun. Call Eugenia Marks before 9:15 am at 272-8424. $5, members $3. All ages. Advance registration.

ASRI Environmental Education Center Programs, 1401 Hope St. (Route 114), Bristol. 245-7500; www.asri.org. $6; $5 ages 65+; $4 children 4-12; children under 4 and ASRI members free.

•Thu. Discovery Stations. Children get to take a closer look at nature. Weekly themes include birds, insects, tide pool, whales, mammals and more. 10 am-2 pm. Ages 3+. Free with admission.

•Sat. Promoting Environmental Awareness in Kids (PEAK). A hands-on, interactive program that teaches children how to have fun outside while practicing responsible outdoor recreation. Features fun and colorful illustrated characters such as Trek and Track (pair of hiking boots), Zoom (binoculars), Digger (trowel), Flash (camera), Pointer (compass), Sparks (camping stove) and Pitch (tent). Hands-on activities and interactive games to engage children with important environmental messages in a fun and entertaining way. 10:30 am-12:30 pm.

•Sat. Meet and Greet with Barbara Gee, author of The Rhode Island Gardener’s Companion: An Insider’s Guide to Gardening in the Ocean State. 11 am-1 pm. Free with price of admission.

•Sun. Build an Edible Landscape. Ages 3+ plant, dig, water and nibble as they create a mini edible Audubon garden and learn about the life cycle of a plant. Dress to get dirty; bring your favorite garden tool. 11 am-1:30 pm.

Biomes Marine Biology Center, 221 Shady Lea Rd., North Kingstown. 295-4690. Marine exhibits, hands-on activities for children ages 3+ with adult accompaniment. Daily noon-4 pm. $5, children 2 and younger free.

Denison Pequotsepos Nature Center Program: Paddle the Pawcatuck (Bradford to Potter Hill), 109 Pequotsepos Rd., Mystic, Conn. (860) 536-1216; www.dpnc.org. Portage around the Bradford Dam and downstream to Potter Hill, passing conservation lands owned by the Nature Conservancy and the Westerly Land Trust. One-way downriver with return shuttle. Meet at center at 9 am or at the put-in at 9:45 am. Sat. $20, members $18. Bring your own kayak or canoe and lunch.

Exhibit: Home and Away, Tiverton Town Hall, 343 Highland Rd., Tiverton. Exhibition of nature photographs by Harry Glaser. Mon-Fri 8:30 am-4 pm.

Flutterby: Butterflies in Bloom, Roger Williams Park Zoo, 1000 Elmwood Ave., Providence. 785-3510; www.rogerwilliamsparkzoo.org. New walk-through exhibit is set inside a 2,100-square-foot greenhouse landscaped with butterfly-friendly flowers and nectar plants and featuring about 500 butterflies (North American species), offering visitors a close encounter. Daily 9:30 am-4:30 pm. $3, children 3-12 $2 in addition to zoo admission ($12, seniors $8, children 3-12 $6).