Set of 3 puzzles with an increasing number of pieces in order to advance the level of difficulty and develop dexterity and attention. The puzzles can be used to play an assembly game, which involves fitting the pieces together to make a picture. This activity helps to increase and consolidate hand-eye coordination, spatial organization, recognition and differentiation of shapes and colors, reasoning, the child’s attention span, concentration, etc., as well as increasing the child’s self-confidence and sense of personal achievement.