Reusable Math Roller Stamp

2-in-1 Quick Addition and Subtraction: You can quickly prepare math problems for your kids at home, just roll the stamp, you can quickly print math problems, and it dries quickly, conveniently, and practically. Arrangement needs to be changed every 10 math problems to avoid duplication.

 Reusable: Small and exquisite, easy to carry, and can be reused after adding ink. The imprint is clear, the color does not fade after drying, and it is not easy to smudge.

 Efficient and fast: Rotate and adjust column types, you can adjust 10 different queue sides. , you can quickly prepare math problems for your child at home. You can quickly complete the quiz simply by scrolling through the math questions.

 Unlimited Ink Refills: Its refills holes on both sides of the stamp, the ink can be refilled with 5-8 drops on the side of the roller stamp when it runs out of ink without having to change the roller and wait a few minutes the ink to absorb before continuing to use it happily. Easy carry to stationery boxes, school bags

 Learning and Education Gift: This is a great gift, when children need to practice math problems, parents can quickly prepare them for them, and children can also prepare for each other and learn together.