The set consists of four blocks each containing ten cylinders of varying lengths and/or diameters. Each block and cylinder is made of solid wood with a natural, satin touch finish, and each cylinder has a large wooden knob attached for a secure and comfortable grip. Block 1: The cylinders vary directly in three dimensions. Block 2: The cylinders vary in two dimensions. Block 3: The cylinders vary in one dimension. Block 4: The cylinders vary inversely in three dimensions.
