Pair these 16 stones with the tactile threading pebbles to engage the senses and advance essential early childhood skills. An early STEM resource, children will develop basic Math skills through counting and sorting the pebbles. Hand-eye coordination will develop when children sort and sequence the stones by shape, color, and texture. This set comes with 16 threading pebbles in four different shapes, shades, and textures, plus two laces. Made with a stone/resin mix, these are perfect for indoor and outdoor use. The pebbles measure 1.5 inches and the laces measure just over 22 inches. We recommend the Yellow DoorⓇ Tactile Threading Pebbles for children ages 2 years and older.