Since 2005, Bonnin has been involved in science broadcasting. She presented the show "Gadgets, Gadgets, Gadgets" in 2005 and co-presented the BBC science series "Bang Goes the Theory" on BBC One from 2009 until 2014. In 2008, Bonnin presented a documentary series "Science Friction" on RTÉ One which looked at taboos in discussions of scientific topics (such as paedophilia and nuclear power) in Ireland. She also contributed to BBC Two's series on the work of the London Natural History Museum, "Museum of Life".