You will receive 1pcs addition and subtraction teaching stamp and 1 bottle of ink One end is the addition stamp, the other end is the subtraction stamp, the newly upgraded math practice stamp 2 in 1 design By rolling the stamps, the math problem will appear in front of you The roller digital teaching stamp is equipped with ink, 5-6 drops at a once, which can be reused The teaching seal can satisfy children's learning from 1-100 addition and subtraction methods and cultivate their logical calculation abilityAge Range: 3+ years old Product Description Addition & Subtraction 2 in 1 Math Practice Roller Stamps Addition and subtraction math stamps can improve children's learning pleasure and logical arithmetic skills 2 in 1 Math Roller Stamp Specification: Color: blue/pink Size: 2.99x2.52x1.26inch Age Range: 3+ years old Styles: Addition/Subtraction The package includes: 1pcs math roller stamp + 1pcs ink