Elite Montessori Thick Single/Multiple Shape Jumbo Knob Puzzles Preschool Toddler Learning Material (Single Shape Puzzles)This item strengthens fine motor skills, matching, grasping and memorization. Their intelligence is challenged by the size of the shape and also problem solving skills when the item does not fit. Gives them the visual concept of small, medium and large. The Geometric shape puzzle is a great hands on learning tool for any learning environment