4 sets of 10 cylinders varying in height and/or diameter in each set. Each set is in a separate wood box with the lid painted the same color as the cylinders: red, green, yellow and blue.

Develop a child's visual perception of dimension. It also provides experiences in comparison, grading and seriation - indirect preparation for mathematics.

Size of Each Wooden Box: 16.50 cm x 11.45 cm x 7 cm