Some very cool things. How do the reading glasses work, though? Can't be mirrors. Must be some kind of lenses.why can't they be mirrors?
why can't they be mirrors?
What looks really mysterious to me is the portable extention bridge. I looks so fragile and still there are 10 persons standing on it.
One wheel motorcycle
Me want
Because mirrors invert the view. And no, you can't simply turn the book.That's why you use 2 mirrors. (http://en.wikipedia.org/wiki/Periscope)