The city is hosting a storm drain stenciling project in Waimānalo. Volunteers will meet at Waimānalo Elementary & Intermediate School. Free.

The city is hosting an Adopt-A-Stream project in Kuapā. Volunteers will meet at the Kalihi Waena Elementary School parking lot. Must be 13 and older. Supplies and refreshments will be provided. Volunteers should wear covered shoes, long pants, a hat and sunscreen. Free.

The city is hosting an Adopt-A-Block project in the Kalihi-Pālama area. Volunteers will meet at Pua Lane. Must be 13 and older. Supplies and refreshments will be provided. Volunteers should wear long pants, covered shoes, a hat and sunscreen. Free.

Reef Check Hawai‘ will host its next in-water training and survey on March 29. Volunteer training session on O‘ahu will precede the survey on March 26 & 27. Classes will be held 6:30 to 8:30 p.m. at Windward Community College Hale ‘Imiloa Room 122 in Kāne‘ohe. E-mail krista@reefcheckhawaii.org. Visit Reef Check Oahu March Training

Reef Check Hawai‘i is hosting a training session on March 26 & 27. Classes will be held 6:30 to 8:30 p.m. at Windward Community College Hale ‘Imiloa Room 122. In-water training and survey to follow on Saturday, March 29. E-mail krista@reefcheckhawaii.org. Visit Reef Check Oahu March Training

Reef Check Hawai‘i is hosting training classes on March 26 & 27. Classes will be held 6:30 to 8:30 p.m. at Windward Community College Hale ‘Imiloa Room 122. In-water training and survey to follow on Saturday, March 29. E-mail krista@reefcheckhawaii.org. Visit Reef Check Oahu March Training

The Nu‘uanu Adventure begins with an exploration of Kapena Falls and the Nu‘uanu petroglyphs. The next leg of our adventure will take us to the Nu‘uanu-Judd Loop Trail, followed by a visit to Kamehameha III’s summer palace, Kaniakapupu. Easy, 3 miles. Ages 7 and older. $14 for parent and child team. Call Pauline Kawamata, 955-0100 ext. 18. www.hawaiinaturecenter.org.

Pa‘ani i ka hua laulima hana. (Play is the result of many hands working — Hawaiian Proverb.) Hard work and play are integral parts of the Hawaiian lifestyle. Spend part of the day “at work” and when the work is done the play will begin. Learn Hawaiian games and make a craft to take home. For ages 5 and older. $14 for parent and child team. Call Pauline Kawamata, 955-0100 ext. 18. www.hawaiinaturecenter.org.

“Hawaiian Perspective of the Environment and Kumulipo (Hawai‘i Island), a lecture by Rubellite Kawena Johnson. Reservations not necessary. Free. Call Joy Cunefare of Bishop Holdings Corporation on O’ahu at 521-1408. 

Spend a morning investigating hermit crabs and their housemates through storytelling, art and up-close encounters with these crusty creatures. Adults and their 4- to 6-year-olds will meet left-handed, elegant and anemone hermit crabs and then create a crab of their own design. $16 adults and child team, $12 for members. 440-9007, www.waquarium.org.