ABSTRACT The authors discuss how tangible user interface objects can be important educational and entertainment tools in environmental education. The authors describe their interactive installation artwork Reefs on the Edge , which incorporates tangible user interface objects and combines environmental science and multiple art forms to explore coral reef ecosystems that are threatened by the effects of climate change. The authors/artists argue that the use of tangible user interface in an installation-art setting can help engage and inform the public about crucial environmental issues.