The Museum's interactive science centre, Discovery World, opened In 1991. During the redevelopment it was moved from its original ground floor location to the first floor. The Tropical Forest, an immersive butterfly rainforest environment featuring the flora and fauna of the tropics, opened as a major addition to the science centre in 2007. Discovery World Tropical Forest has become an important visitor attraction in its own right. A planetarium was a further addition to the science centre in 2015. During 2017 the science centre was further redeveloped, and opened in December of that year as the 'Tūhura Otago Community Trust Science Centre'.