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SAVE TIME: Easy to operate, by rolling the stamps, the math questions can appear in front of you, adjustable, and can be changed by gently twisting the button.
REUSABLE & SAFE: The math roller stamp is made of durable PVC material and uses the highest quality cuts to ensure a clear impression every time. Dries quickly without fading. With oil-based ink, no acid and lignin, kid-safe.
DIGITAL TEACHING STAMP ROLLER: Our math stamps come in 2 styles (addition, subtraction), just scroll gently, math problems will appear in front of you, it can print out math problems within 100 efficiently and quickly.
PORTABLE SIZE: 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.