1.BRIGHT COLORS AND WONDERFUL TO TOUCH -- These lightweight, colorful stones have immediate visual appeal plus their warm, smooth surface makes them a wonderfully tactile early math resource. Children will be fascinated by the pebbles' bright colors, odd shapes and warm feel which make stacking even more fun.2.TEACH STEM -- These plastic pebbles are great for stacking and developing fine motor skills. Use the multiple colored pebbles to make artistic designs or teach children counting and sorting exercises.AN EARLY MATH MANIPULATIVE -- Young minds will love this hands-on teaching aid in learning how to count, add and subtract.3.DEVELOP LANGUAGE AND DESCRIPTIVE SKILLS -- The vibrant colors and varying sizes of the pebbles inspire kids to practice their adjectives and talk about their designs.4.SUITS ALL AGES -- The versatility of this teaching aid ensures that students from preschool to kindergarten and up will learn from these colorful shapes.5.CONVENIENT STORAGE -- Packaged in a durable plastic storage case for easy clean up, ensuring of the colorful stacking plastic stones are lost. This also teaches preschoolers and kindergarten students the value of organization.6.GREAT VALUE -- 20 double-sided activity cards are included to show colorful designs and ways to stack the pebbles. Use as a teaching aid to assist child creativity.Includes tongs, dices and rainbow cups for more games.