Milwaukee, Wisconsin, at the retail store American Science and Surplus (see photo). Each ball was an inflatable exercise ball in diameter (encased in steel rings), and was supported from the ceiling using extremely strong magnets. It was dismantled in early August 2010 due to maintenance concerns. In popular culture Newton's cradle has been used more than 20 times in movies, often as a trope on the desk of a lead villain such as Paul Newman's role in The Hudsucker Proxy, Magneto in X-Men, and the Kryptonians in Superman II. It was used to represent the unyielding position of the NFL towards head injuries in Concussion. It has also been used as a relaxing diversion on the desk of lead intelligent/anxious/sensitive characters such as Henry Winkler's role in Night Shift, Dustin Hoffman's role in Straw Dogs, and Gwyneth Paltrow's role in Iron Man 2. It was featured more prominently as a series of clay pots in Rosencrantz and Guildenstern Are Dead, and as a row of 1968 Eero Aarnio bubble chairs with scantily-clad women in them in Gamer. In Storks, Hunter the CEO of Cornerstore has one not with balls, but with little birds. Newton's Cradle is an item in Nintendo's Animal Crossing where it is referred to as "executive toy". In 2017, an episode of the Omnibus podcast, featuring Jeopardy! champion Ken Jennings and musician John Roderick, focused on the history of Newton's Cradle. Newton's cradle is also featured on the desk of Deputy White House Communications Director Sam Seaborn in The West Wing. In the Futurama episode The Day the Earth Stood Stupid (episode 7 of season 3), professor Hubert Farnsworth is shown with his head in a Newton's cradle, and saying he's a genius as Philip J. Fry walks by. Rock band Jefferson Airplane used the cradle on the 1968 album Crown of Creation as a rhythm device to create polyrhythms on an instrumental track. See also Galilean cannon References Literature B. Brogliato: Nonsmooth Mechanics. Models, Dynamics and Control, Springer, 2nd Edition, 1999. External links Educational toys Executive toys Novelty items Metal toys Physics education Science demonstrations Science education materials Office equipment