I have an 11-year-old daughter and 9-year-old son and hoped this book would be a useful reference for them, as it explains the basic concepts of Maths in a fun way. The back of the book states it is aimed at Key Stages 2 & 3, so is perfect for my kids and they have both picked it up at various times.
It covers a range of mathematical topics: starting with the basics, such as numbers and units what they actually mean; covering sums, multiplication and x values; then onto shapes and solids, including pi and finally covering the meaning and use of data, such as graphs and charts.
A very useful reference then, I can see my children using this often, as it covers these concepts in a fun, easy-to-understand way and features some characters to help this along, together with some historical facts and figures. Highly recommended!