Optical toys (some too delicate for children) invented or popularized in the nineteenth century. From the magic lantern to the kinora, twelve exhibits at the North Carolina School of Science and Mathematics.
dead link: http://courses.ncssm.edu/gallery/collections/toys/opticaltoys.htm
Started in the 1940s as a one-man project, this museum memorial is still a work in progress, carving a mountain into a representation of Crazy Horse on his steed. (Crazy Horse never allowed his picture to be taken, so it is not his likeness.) The 'Carving a Mountain' section is informative on this uncommon medium.
dead link: http://www.crazyhorse.org/
This San Francisco museum has a collection of old coin-operated games and such. Fortune tellers, an arm wrestling machine, and many more. Admission is free, but the machines still need coins. There is a java app offering a virtual tour of the museum.
This is the second largest electric shovel in the world, designated a Regional Historic Mechanical Engineering Landmark by American Society of Mechanical Engineers, and now functioning as a museum dedicated to the strip mining heritage of Kansas.
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