Abstract: Representations of letters of the alphabet have surfaces which have a feel on being touched which are different from the feel of surfaces of other letters. The letters may be presented in a book having a plurality of pages, each page displaying a letter of the alphabet, the surface of the letter having a feel on being touched which is different from the feel of its page and from the feel of other letters. The letters may also have a different appearance from the appearance of other letters. Each letter may have a combination of feel and appearance which is different from the combination of feel and appearance of each of the other letters. The letters may be disposed in a plane which is offset from a plane defined by its page. Each page is preferably split into a first portion which displays the uppercase form of the letter and a second portion which displays the lowercase form of the letter, the first and second portions being capable of being turned independently of one another.