Generic Pack of 4 Roller Digital Teaching Stamps - Educational Math Toy for 100 Addition, Subtraction, Multiplication, Division Practice With 4 Ink Bottles

[Teaching Stamps for Kids]: 4PCS smart math roller stamps,: Addition +Subtraction + Multiplication+ Division, 4PCS bottles of ink [Math Practice Stamp]:The math stamps as fun as toys, make learning fun and exciting, Increase children's interest in learning ! Suitable for students to practice, Parent guidance, Teacher teaching,stationery and 1st grade teaching supplies. [Easy To Use] :Efficient And Fast ，The math questions can appear in front of you by scrolling the kiddo stamp. [Rotary Adjustment Design]:10 different queue modes can be adjusted, Satisfy all addition and subtraction within numbers 1-100, Develop children's logical calculation ability. [ Refill Pack]: Durable，Equipped with 4 Free refills ink, Open the oil cap and drop 5-6 drops at once,the kiddo stamp can be reused.