4 Pieces Roller Digital Teaching Stamps - Educational Math Toy with 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.