Although flat and oval shaped, their first use was carpentry. The eraser was then added in 1858 by Hymen Lipman who patented the idea. Creating different hardness' to pencils was discovered by ...

Slide 1 of 3, , Erasers can be used to rub out pencil on paper Mistakes made with ... You can even use the line tool within different shapes or to make your own shapes. Have a go at making a ...

There are some inventions that look completely pointless to the untrained eye: who would ever need a motorized garbage can, an electric pencil sharpener or a battery-powered eraser? Quite often ...