Ages 5 to 7 years. It is very important to develop logical reasoning skills in children because such skills help in boosting the confidence level and decision taking skills of kids. This series has been developed keeping this point in mind. It contains topics like Pattern Completion, Geometric Shapes, Odd One Out, Grouping, Analogy and Ranking Test. Very beautiful images, cartoons have been used to support the content and attract the attention of the children aged between five to seven years old. Overall, a perfect book to build the logical reasoning abilities in children.