The Teaching stamp is small and lightweight, portable to carry at anywhere, you can add ink for reuse, clear printing, not easy to fade, can be used for long time. The Roller Digital Teaching Stamp is small and exquisite, and comes with a storage box. When the ink is used up, you can fill it on the roller side. This Addition & Substraction Math Stamp Roller can improve the speed and accuracy of oral and written calculations. Also kids can make a competition by playing this educational toys. Rotate and adjust the column, and 10 different queuing methods can be adjusted. Satisfy all addition and subtraction numbers from 1-100, and cultivate children’s logical calculation ability. These are 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. Add printing ink, which can be used repeatedly. Rotate and adjust the column type, you can adjust 10 different queue methods for addition numbers from 1-100. The math roller stamp is made of durable PVC material and uses the cuts to ensure a clear impression every time. Dries quickly without fading. With oil-based ink, no acid and lignin, kid-safe.
How To Use:
- Open the ink inlet on the side of the stamp
- Carefully add 4~5 drops of ink
- Tighten the lid to prevent the ink from spilling
- Rotate and adjust the column type
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