Mattel and Google are partnering on a major, digitally powered update of the classic ViewMaster. While the 75-year-old device let you click through circular slide disks, the new one lets
you insert a smartphone into a headset. An app for the phone lets viewers get an immersive experience of just about anything. Mattel and Google unveiled the virtual reality viewer last week. The
first versions will be available in the fall.
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