Well before the digital age – before smartphones and tablets became the predominant means of looking at photographs, and before virtual reality headsets such as the Oculus Rift were invented – kids ...

Long before Instagram trained the eye to stare fixedly — and longingly — at dazzling sights from around the world, there was the View-Master. Introduced in 1939, this hand-held stereoscopic viewer ...

1. The View-Master is a stereo viewing device that came out in the 1930s and was very popular for years. You put your eyes up against two viewers (one per eye) and see a stereo-sort-of-3D image. 2.