Gallery was designed to contain four eco-systems typical of Flor- ida environments. Within the Physical Sciences Arcade, there are four halls in the open exhibit area; the Halls of Waves, Electricity, Forces and Light. Each exhibit pertains to that particular unit and all of the exhibits are designed to be relocated to a different space. Color was utilized throughout the Science Center in various capacities. Red was used in the entrance to stimulate people and other colors such as blues, greens and yellows were used to create visual differences be- tween halls. The neon tunnel creates a circulation path that is symbolic and not rigid. The neon lights are computer-generated and controlled, thereby creating motion and drawing people into the tunnel. The building is heated and cooled by an energy-efficient heat pump. The entire building has a fully automatic fire sup- pression system. The ceilings are an exposed system of bar joists and mechanical ductwork with polished aluminum used in some places. Artificial lighting is the predominant source of illumination in the exhibit area. At the stairwell, the window opens up the space and provides a source of natural light. The expansion of the Orlando Science Center is very exciting and very innovative. It utilizes materials in space-age fashion, stimulates children to want to look at the exhibits while holding adults' interest as well. Most of all, the space was designed to encourage the participation of visitors and it seems to do that very well. Gail Fein is a writer living in Orlando. The Physical Sciences Arcade with the Hall of Waves seen in foreground. The observation deck at the far right allows better viewing of the first floor exhibits. Photo by J. Kevin Haas. section 'a' section 'b' FLORIDA ARCHITECT September/October 1985