I work in a school and got this book from Amazon Vine to enable me to test it on the 6 to 7 year olds I support in class. Without exception, their eyes were as wide as saucers when I opened it up and showed them it's treasures.
It is an extremely colourful, busy book which for some kids could, be distracting, but those in my class loved it. I would get it out as a treat for those who had finished their work first, or as a bribe for those a little slow to finish. As a parant, I would recommend it to anyone with little ones who love figures.
Each page has cunumdrums for children to solve, like 'What's the total of all the red numbers on this page?'. It also has an amazing array of intricately interconnected digits popping up all over the place and there are tabs to pull to make others stand up too, or to reveal more questions.
I would recommend this book to teachers, parents or grandparents. I think it is a truely remarkable feat of engineering and a pleasure to look through!