Hawaii Pacific University: Computer seminar, 12:15 p.m. Free. Call 544-0238.
Snooze in the Zoo: Honolulu Zoo camp-out features folktales, songs and a tour with zookeepers, 6 p.m. Costs $27 adults, $25 children. Reserve at 971-7195.
"Nukes in Space": Helen Caldicott, founder of Physicians for Social Responsibility, talks about a fact left out of the movie "Apollo 13" -- the 8.2 pounds of plutonium carried on the craft and buried after its re-entry in the Pacific -- and the global nuclear risks of NASA missions, 7:30 p.m., UH-Manoa's Kuykendall Auditorium. Free. Call 956-7866.
Estate planning: Attorney from Estate Planning Services of Hawaii discusses setting up an estate plan and
living will and planning for inheritance taxes, 10 a.m., St. Francis Medical Center-West, Ewa Beach. Costs $5. Call 678-7262.
Molly Harris Olson, formerly with the President's Council on Sustainable Development, speaks on "Building a Bridge to a Sustainable Future," noon to 1:30 p.m. in Biomed B103. Admission $5. Call 956-7221.
Wildest Show in Town: AT&T presents the Ka'au Crater Boys, 6 p.m., Honolulu Zoo. Free admission from 4:35 p.m. Summer concert series continues Wednesdays through Aug. 28.
Orchid Society of Manoa: Jack W. Woltmon discusses the how's and why's of registering orchids, 7:30 p.m., Manoa Valley District Park. Call 537-3071.