Oh, having said so much, I haven't said its function yet! Next, let me tell you!
It has three functions. The first function is: every hot summer, it will automatically run out of my ears to protect me from the sun. That feeling is as cool as being in an air-conditioned room. And in the cold winter, it will block the cold wind for me. Therefore, even in the snowy street, I feel as comfortable as in a greenhouse.
Its second function is to take me to various places and countries.
Whenever I want to visit a place or a country, it will change its wings, put it on me and take me there. And I don't need to bring anything, because I can change anything I want.
Its third function is to help me listen to the teacher.
Whenever I am sick, busy and can't go to class. It becomes an invisible umbrella, flies to the classroom, helps me with my class, and then goes home to give me a lecture. So even if I can't come to school because of illness or something, I won't delay my study.
How's it going? Is my umbrella amazing? I wish I could invent such an umbrella! I think: as long as I work hard, nothing is impossible! You say, is it?