Digital Math Roller Stamp for Education Looking for ways to get your child to love learning more? Our educational stamp will stimulate children's interest in math. By simply rolling gently, you can efficiently and quickly print various math problems. Save Your Time Quickly prepare math problems for your children at home. You can print quickly by simply rolling through the math problems, and it dries quickly. Elementary school students do one page a day to improve the speed and accuracy of mental arithmetic. Adjustable Design Rotate and adjust the column type; adjust 10 different calculation methods. You can change the calculation questions with just one click, strengthening your child's math ability through continuous practice. Reusable Educational Stamp Small and exquisite, easy to carry, ink can be added for reuse. The print is clear, and it does not dry or fade after printing. Our math stamps come in 4 styles (Addition, Subtraction, Multiplication, Division) and 4 bottles of ink. Learning and Educational Gift It's fun for kids to roll the stamp and then fill in the answers. Children, teachers, and parents can use it for practice; this digital educational stamp is definitely a fun and meaningful gift for your child or your child's friend.