The books in this series aim to pleasantly fill children's free time. Each double page contains original and entertaining activities for endless hours of creative engagement.

Among other things, they include:

• logic games
• knowledge tests
• visual perception exercises
• mazes
• patterns
• puzzles
• magic squares and numeric squares
• riddles

With these activities, the child:

• absorbs the knowledge they have already acquired
• masters new knowledge
• practices their memory and observation skills
• sharpens their visual perception, imagination, and curiosity
• nurtures their creativity
• learns to make logical and mathematical reasoning, to process information and draw conclusions.

At the end of the books, there are detailed answers, so the child will not be left with any questions or doubts.