8.7 If you could invent something to help all of humankind... what would you invent?

If I could invent something to help all of humankind, I would invent "the dreaming pillow". People only use it when they are sleeping, they can have a good dream! Moreover, someone image that they want to do, they can do it in their dream. I have dream almost everyday, and I like to listen someone's story of their dream. If I have it, I want to fly or want to do something that I can't do in the real world. If I invent it someday, please use it, if you like.