Participatory physical visualization where people pick badges from tanks to vote. A lower bar means more votes. Source: Lucy Kimbell (2006). Physical Bar Charts.
2009 – Centograph: Dynamic Bar Charts Show Keyword Popularity
Ten actuated bar charts that show the popularity of keywords of interest in news articles over time, made by the company Tinker from London. A separate search interface is provided on a regular desktop computer and sends queries to the Google News Archive. It is permanently installed in the St Paul's School for Boys Computing Department in London. Sources: infosthetics Tinker London