Our educational Math Stamp can not only be used by teacher, but also for students. Its good ergonomic design, makes it easy to handle and easy to use. With its fine workmanship, it can ensure its practicality. You can change the question by turn the wheel, and this Math Roller Stamp some math addition and subtraction. Features -Color:Blue -Material:Plastic -Size:7.50X6.50X3.20cm/2.95X2.55X1.26in - Lovely in appearance, this Math Stamp might be a meaningful present for your children or students. - Since is constructed of plastic, you may use this Stamp with confidence, and is safe for kids to play with. - With the compact size design, it can be easy to take and store, very convenient. - Simple, automatic oil discharge design allows children to freely do math homework. - These math stamp can be used for addition and subtraction, multiplication and division, small and portable. Package list: 1 x Math Practice Stamp