The Exploratorium, located in San Francisco, is a world-renowned, playful learning laboratory of provocative exhibits and experiences that ignite curiosity and transform the way people learn.
Frank insisted that play is a very important part of learning, for people of all ages.
Frank update: 53/100.
Follow 100 Days of Exploratorium founder Frank Oppenheimer at our Frank100 tag: http://exploratorium.tumblr.com/tagged/frank100
Images © Exploratorium, www.exploratorium.edu