Montessori Knobbed Cylinder Set of 3 Blocks Includes 3 beautifully crafted hardwood knobbed cylinder blocks with 10 cylinders. Assists children in developing visual discrimination of size, volume, thickness and height. Indirectly prepares children for holding a pencil as they grasp each knob. Lightly lacquered with easy grasp, sturdy knobs. Develops eye-hand coordination and enhances fine motor skills. Lightly lacquered with easy grasp, sturdy knobs.