This set includes extended exercises to more advanced level and covers various intellectual growth areas via fun playing. These high-level challenging exercises complete the intellectual development for children ages 3 to 5. There are total of 330 challenging questions included in the following 5 workbooks: Identify and Relate, Transportations and Traffic Signs, Brainteasers for Kids, What Belongs Together 2, and All About Colors and Shapes. (bambinoLUK Controller needed. Sold separately)