Montessori Wooden Knobbed Cylinder Blocks, Natural Wood

A classic Montessori sorting material: wooden blocks with rows of cylinders, each with a small knob on top, that fit into matching holes. Children lift each cylinder by its knob and find the right hole by comparing height, width and thickness, as the listing describes. This version is plain natural wood; the photo shows the set with a block about 15.2 cm long and 3.5 cm tall. The listing recommends it from 2 years. Use under adult supervision.