Fiske Planetarium Experience Passes Enjoy a free pass (for a family of four) to a weekend show at Fiske Planetarium! Check out this CALENDAR (March 2020) of available shows and then email Elektra Greer to reserve your pass. Please list your top 2 choices for day and time. Share This Tweet Share Share Email Related Posts Denver Zoo Each pass admits up to 4 people (children 2 and under are free). Zoo tickets are date specific. The Colorado Railroad Museum Over 100 locomotives, passenger cars, freight cars and cabooses. The pass admits up to 6 people. Wings Over the Rockies Passes include the Denver Air & Space Museum and the Exploration of Flight Museum in Englewood.