Many teachers include discussions of Mao badges in talking about the Cultural Revolution. (See the lesson plans forum for lessons that include references to the Mao personality cult and such badges.) Here's a link to a couple of articles on Mao badges: https://china.usc.edu/comment/86221#comment-86221
And now Helen Wang, the curator of East Asian money at the British Museum, has published an extended study of Mao badges: http://www.britishmuseum.org/research/publications/research_publications_series/2008/chairman_mao_badges.aspx
The photo below of children with their Quotations of Chairman Mao books and Mao badges was taken by Bu Pingyuan and was part of a Hong Kong Museum of History exhibition (http://www.info.gov.hk/gia/general/201107/05/P201107050128.htm) .
