Microsoft HoloLens is like wearing a special computer on your head like a helmet. It's a device that lets you see things in 3D, just like you're playing a video game in real life.
It's like when you watch a movie and the characters run or fly out of the screen and into the room with you. But with HoloLens, you can walk around and interact with the things you see in real life, like a hologram. It's like you have magic powers and can control what you see and hear.
You can wear it while you play games or watch movies, but it's even more exciting because you can also use it to help you learn new things, like science, math, or history. You could learn about how the planets move and see them float in front of you, or watch a volcano erupt as if you're really standing there.
The HoloLens also has lots of business and industrial uses. You can use it to help design a building or create a new product. Imagine you're designing a new car, and you can see a realistic 3D model of it right in front of you, and you can move around it like you're inside the car!
Overall, the Microsoft HoloLens is a very special and advanced device that can show you things in 3D in real life, and make learning, playing, and designing things more exciting and interactive.