Features: *High Quality MateriaL: The math stamps is made of high quality material material, durable and not easy to break, can use for a long time. *Easy to Carry: The math stamps is small and compact, it is portable and easy to carry. *Easy to Use: The math stamps is easy to use, just rolling it, then can get many math problems. *Great Learning Tool: The stamps can be adjusted flexibly, giving children a fun and meaningful gift! Make learning fun and exciting! Suitable for student practice, parent guidance, teacher teaching. *Random Math Problems: Number stamps can change different numbers, form math problems, and scroll smoothly, can develops children's logical calculation ability. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABS Size: 5.5*3.5*8.5cm Package List: 1 x Math Stamps