About this Item

• 💓[Friendly Material] Addition and subtraction rolling seal is made of durable PVC material, which is cut with high quality to ensure that clear marks can be left each time it is used. Its ink will dry quickly and will not fade.
• 💓[Efficient and Fast] The digital teaching stamp cylinder is an adjustable number, which can be rolled gently. When it is practical, different numbers can be changed to form mathematical problems, and mathematical exercises within 100 lines can be printed efficiently and quickly. Help children learn arithmetic better.
• 💓[Reusable] This addition subtraction rolling seal is small and delicate, easy to carry, and can be reused after adding ink. It is very convenient for you to use the addition and subtraction rolling seal.
• 💓[Easy to Operate] You only need to prepare a piece of white paper. First, you can get the number you want by adjusting the side axis and twist button. Then you need to add ink into the seal, and then you can create a mathematical problem by rolling the seal.
• 💓[Best Gift] Roller digital stamps are special gifts for children, family and friends. It is a wonderful Christmas birthday Easter gift for children and a wonderful gift for other occasions. It’s a great gift even for parents. It is very suitable for parents and children to study together.