2 in 1 Math Roller Stamp Within 100 Multiplication and Division Dual Head Smart Math Practice Stamps

4 6 Years. The numbers are adjustable, roll gently, quickly ask questions, and no longer have to count the questions at high prices. Rotating adjustment row type, adjustable 10 different line methods. Primary school students make one page a day to improve calculation speed and correctness, cute and practical. The mark is clear, that is, the printing is dry and does not fade, and the printing oil is added, which can be used repeatedly, easy to use and fun