Help your children develop fine motor skills, hand-eye coordination and problem solving skills by introducing them to this toy set. besides the purpose of color matching, it also teaches the concept of size with cylinders of different sizes and diameters. it will be sent with 12 rollers and a table. cylinder diameters are 20mm, 25mm and 30mm. cylinder sizes are 40mm, 60mm and 80mm. it encourages early child development. suitable for children aged 3 years and above. it is recommended to be played with parents. it will be sent with a carrying bag for easy carrying and storage. it is made of birch plywood and beech wood. they are extremely durable. they can withstand impact and drop. it is smooth and does not splinter. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.