Colouring Book 4 This range of colouring books are for all ages it does not matter how old we get we never lose that joy of colouring with bright colours, not only is it relaxing as we slowing move the pencil back and forth on the page but it gives us great enjoyment to see the finished colour drawing, all our colouring books have a colour wheel to help you in choosing the colours. However, one thing is to break the colour rules and have fun.