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 effect2.Please allow 1-3cm deviation due to manual measurementMaterial: ABSSize: 5.5*3.5*8.5cm