Great book to follow Numbers from Building Blocks of Mathematics. Was planning to use it with my 8-year-old, but as a dyslexic, it's just too much for him to follow. It actually made him more confused even though he already knows subtraction. As a tactile learner though, this is no surprise, it's a great book nonetheless! We will definitely give this book a second try by breaking it down and using each 'chapter' in a tactile way while reading along.