A 3D View Master, also known as a virtual reality viewer, is a stereoscope device that allows users to view images in three dimensions. It was first introduced in the 1930s as a toy and has since become a popular tool for entertainment and education. The View Master works by presenting two nearly identical images to each eye, which creates the illusion of depth and gives the perception of a 3D image. The user can then operate a lever to advance through the series of images. The View Master has evolved over the years, from its early cardboard models to the more modern plastic versions that are equipped with advanced features. In recent years, 3D View Master has made a comeback as a nostalgic, retro item, appealing to both children and adults. It offers a unique and immersive way to experience 3D images, making it a popular choice for virtual reality enthusiasts and collectors alike. Overall, the 3D View Master continues to captivate people with its ability to transport users to different worlds and provide a captivating viewing experience.