pH Indicator from Red Cabbage

Here is a good article from About.com which describes how to use red cabbage to make a pH indicator solution.

http://chemistry.about.com/od/acidsbase1/a/red-cabbage-ph-indicator.htm

and and image of the pH of various solutions with the indicator.

http://images.flatworldknowledge.com/averillfwk/averillfwk-fig16_013.jpg