The brightly colored material is soft and flexible, yet durable. Each shape has a recognizable geometric form: triangle, circle, oval, rectangle, square, hexagon. Each textured bead has an extra-large threading hole, making it easy to string them all together using a variety of materials. Use this set of sensory beads to help kids reduce stress while developing fine motor skills. Can be pressed into clay or dipped into paint to create a variety of artwork. Sizes range from 3-5cm (1-1/4" - 2").