This section is for beginners who haven't worked with VR headsets and Leap Motion yet. A (VR) headset is a head-mounted display in which we can either put a smartphone or that has an inbuilt display that can be connected to HDMI or some other display port. A VR headset can create a virtual 3D environment by mimicking human vision, that is, stereo vision. Human vision works like this: we have two eyes and get two separate and slightly different images in each eye. The brain then combines these two images and generates a 3D image of the surroundings. Similarly, VR headsets have two lenses and a display. The display can be inbuilt or a smartphone. This screen will show a separate view of the left and right image, and when we put the smartphone or inbuilt display into the headset, it will focus and reshape using two lenses and will simulate 3D stereoscopic vision. In effect, we can explore a 3D world inside this headset. Rather than just visualizing...