A plastic Math Roller Stamp for your kids. High-grade and sturdy plastic material makes it durable and portable, it is easy for kids to take them anywhere. The Math Roller Stamp is easy to operate, the math problem can appear in front of kids by scrolling the stamp, which can be adjusted. Features - ColorAssorted Color -Material:Plastic - Size: 4.80X4.50X3.00cm/1.89X1.77X1.18in -The Math Stamp is made of plastic material, which can be , and can be used for a long time. -This math stamp, which is made of , is simple to use and speeds up the efficiency of pressing. -Roll the stamp at a constant speed the white paper, and the math problems will appear in front of you. -Clear printing and no fading, math problems can be easily changed by turning the wheel. -This math stamp is small and , can be reused many times with ink, the seal is clear, and it will not fade after drying. Package list: 3 x Math Stamp