The first kind of pencil was a bunch of graphite sticks held together by string. Then someone decided it would be better to push the graphite into the inside of a hollow wooden stick.
In 1770, English engineer Edward Nairne developed the first eraser. In 1858, Hymen Lipmin became the first person to think of putting a piece of eraser onto the top of a pencil which makes it real easy to rub out mistakes.
In Australia, England, Ireland, New Zealand and South Africa an eraser is called a "rubber."