Since inventing much of the technology behind personal computing in the late 1960s, Alan Kay has dedicated his work to developing better learning environments for children. Now a senior researcher at HP and the president of Viewpoints Research Institute, Kay is launching Squeak, a multimedia authoring tool that allows children to construct dynamic simulations of real-world phenomena. We spoke with him about the unfulfilled promise of technology in schools—and about what computers have in common with pianos.