Certificate for (4) Admissions to Chabot Space & Science Center. 

Chabot Space & Science Center inspires and teaches visitors of all ages about the Universe and Planet Earth.  It is located in the beautiful Redwoods Regional Park of Oakland on 13 trail-laced acres amid the largest stand of coastal redwoods in the East Bay. 

Chabot features a 241-seat full dome planetarium, interactive and hands-on exhibits, space artifacts, a giant screen theater, a Challenger Learning Center, and the only research-level telescopes regularly available to the public for weekly live viewing in the Western United States.

http://www.chabotspace.org/