These versatile stones will develop recognition of shape and number, as well as improving fine-motor skills. Sort the stones by color and shape (circle, square, hexagon), then count, order and thread them together. Each set includes 15 tactile stones (each measuring approximately 2" x 2" x 0.25") and three soft, chunky laces (each measuring 24" long). Loose parts accessories not included. Ages 2 and up.