The reason you are able to see yourself in a mirror is because light comes in and gets reflected, and that's how you are able to see your reflection. Mirrors can have magnification properties, making images appear smaller or larger than their actual size. They can also be concave (curved inward) or convex (curved outward), making the reflected angle and view to be smaller or larger, respectively.
Special mirrors in a museum are good to check out. Some make a person's appearance look quite strange. Also, in a mirror, writing appears backwards, as a "mirror image" of the original writing.
Mirrors are usually made out of sand, in the manner glass is made, but some mirrors have been made of polished metal to show a nearly clear view.
Mirrors with a curved surface can make things appear bigger or smaller, like a lens does.