Snooze in the Zoo: Lie with the lions or be a dreamer with the lemurs at a Honolulu Zoo camp-out, beginning 6 p.m. Participants enjoy folktales, songs and a tour with zookeepers. Costs $27 adults, $25 children. Call 971-7195. Repeats May 24.
Weather Wizardry: The land around us affects our weather in wonderful ways. Children ages 6 to 10 follow the tradewinds to become weather-wise, 1:30 to 3:30 p.m. at the Hawai'i Nature Center. Costs $5. Call 955-0100.
Spend an evening star-gazing at the Observatory, 7:30 to 9 p.m. Fridays and Saturdays. Free. Register at 847-3511.
"Aloha Kilolani: 35 Years of Hawaiian Skies": Program reviews topics from the Planetarium's 35-year history, 11 a.m. and 2 p.m. daily, and 7 p.m. Fridays and Saturdays. Costs $3.50. Call Bishop Museum at 847-8201.
Tropical plant nature walk: 10 a.m. Saturdays and 1 p.m. Sundays at Ho'omaluhia Botanical Garden. Free. Bring walking shoes, insect repellent and rain gear. Call 233-7323 for reservations.
Train rides: Enjoy a 90-minute ride through Ewa 12:30 and 2:30 p.m. Sundays with the Hawaiian Railway Society, 91-1001 Renton Road. Passengers should arrive a half hour before departure time. Costs $8 general, $5 seniors and children. Call 681-5461 for reservations.
Honolulu Boy Choir: Boys ages 7 through 12 may audition for free membership this spring. The choir features traditional songs and dances of Hawaii. Call 596-SING (596-7464).