Roller Digital Teaching Stamp Are you looking for ways to make your child love learning more? Our teaching stamp will stimulate children's interest in mathematics. Just gently scrolling, can efficiently and quickly print out different math problems. Save Your Time Prepare math problems quickly for your kids at home. You can print quickly by just scrolling through the math problems, and it dries quickly. Primary school students make one page a day to improve the speed and accuracy of oral arithmetic. Adjustable Design Rotate and adjust the column type, can adjust 10 different queue methods. You can change the calculation questions with just the turn of a button, strengthen your child's mathematical ability through continuous training. Reusable Teaching Stamp Small and exquisite, easy to carry, can add ink for reuse. The imprint is clear, and it dries and does not fade after printing. Our math stamps come in 4 styles (Addition,Subtraction,Multiplication,Division) and 4 bottles of ink. Learning and Education Gift It is fun for kids to roll the stamp and then fill in the answers. Children, teachers, parents can use it for training, this digital teaching stamp definitely a fun and meaningful gift for your child or your friend's child