Generic Pack of 2 Roller Digital Teaching Stamps - Educational Math Toy for 100 Multiplication & Division Practice With 2 Ink Bottles

【Smart Math Roller Stamps for Kids】: 1PCS multiplication stamp, 1PCS division stamp, 2PCS bottles of ink 【Math practice Kiddo stamp】:Number rolling addition and subtraction question stamp as fun as toys, Makes 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 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 2 Free refills ink, Open the oil cap and drop 5-6 drops at once,it can be reused