Using the math roller stamp is simple and intuitive. Just press the stamp onto an ink pad and roll it across any paper surface to generate math problems. This method not only saves time but also adds an element of and excitement to math practice. It's a great way to keep young learners engaged and motivated to improve their arithmetic skills. Features -Color:Multi -Material:Plastic -Size:6.50X4.70X3.00cm/2.55X1.85X1.18in -Automatic problem generation: generates math problems up to 100 automatically, making it ideal for kindergarten and elementary students -Variety of questions: the adjustable button allows for a wide range of math problems, keeping fresh and challenging -Smooth operation: the roller stamp moves smoothly, ensuring quick and efficient printing of math exercises -Portable design: its compact and delicate design makes it easy to carry, ideal for use or on the go -Engaging and fun: the unique stamp design adds an element of fun to learning, making it a great present for children or friends Package list: 2 stamps + 2 bottles of stamp ink, math question stamps