It's a unique gift idea. Feature: 😲 Adjustable numbers, gently scrolling, quick questions, no need to pay high prices for math questions 😲 Rotate and adjust the column type, can adjust 10 different queue methods 😲 Primary school students make one page a day to improve the speed and accuracy of oral arithmetic, cute and practical 😲 The imprint is clear, and it dries and does not fade after printing. Add printing oil, which can be used repeatedly, easy to use and fun Specification: pink：subtraction、Division blue：addition、Multiplication Fill in the blanks：subtraction、addition Material: PVC Shape: Square Weight: 52g Size: 5.5*8.5*3.6cm Imprint: 20*4mm Color: pink, blue Package includes: 1/2 *Roller Digital Teaching Stamp (Contains a bottle of ink)