"Fun to Learn Wipe-clean" is a series of books designed to teach young children the full range of basic skills they will need in the first school years while keeping things fun for them. Alligator Books Ltd has created books that can be written in over and over, then simply wiped clean with the swipe of a damp cloth or sponge. This can also be helpful for preschool children who are troubled about wrong answers, since a simple wipe allows them to start again with ease. Each "Fun to Learn Wipe-clean" book is filled with a variety of entertaining activities, puzzles, and simply phrased questions, along with drawing and colouring pages. Alligator Books Ltd has created each laminated page to be able to be used with most quality felt-tip pens, non-permanent markers, and crayons. This series is most appropriate for preschool ages, with the addition and subtraction problems suitable for ages 3 through 5, and the multiplication and division problems are geared more towards ages 5 through 7. Each of the four "Fun to Learn Wipe-clean" books is 29.5 cm high and 21 cm wide, approximately an A4 letter size.