Handcrafted Wooden Knobbed Cylinder is a Montessori toy, which teaches children at early age the concept of dimension discrimination. It helps children to subconsciously learn relationship between dimension and volume. Child intuitively tries to match the correct knobbed cylinder to the correct block hole. It challenges child to complete this puzzle. Completion of wooden knobbed cylinder puzzle help build self-confidence. Child follows the trial and error method to complete this little mission. Playing with this wooden toy help child in learning size, concept of geometry, shapes, and counting. It is one of best home-teaching and preschool toys for kids.