SHAPE UP TO BE A MATH WHIZ -- This pack of durable, plastic tangrams features 28 pieces with 7 different shapes and 4 colors. Each of the 4 color-coded sets fits together as a square PROMOTE EARLY LEARNING -- As kids learn how to fit the brightly colored shapes together, they can build fundamental problem solving, critical thinking and perceptual reasoning skills DURABLE MATERIAL -- Made from durable, washable plastic, these tangrams are designed to withstand years of math and puzzle activities MAKE GEOMETRY POSITIVE -- Use these puzzles to create positive feelings about geometry in kids. Watch their understanding of spatial relationships, geometric vocabulary and congruence grow COMPACT SIZE -- The squares measures 2.75". This compact size makes the pieces easy to store at home, in classrooms or on the go DEVELOP COGNITIVE FUNCTION -- These large tangrams help develop an understanding of color and fine motor skills. They're a classic resource for every classroom or in-home learning environment