4 Pcs Smart Roller Stamp,Roller Stamp for Addition Subtraction Multiplication Division, Roller Stamp for Addition and Subtraction

4 different stamps (addition, subtraction, multiplication, division).Product size: 5 * 7cm.

【Early Educational Math Exercise】This digital teaching stamp roller is consisted of multiplication, additions, subtraction and division exercise. Gently rolling, it can print math problems efficiently and quickly which is convenient to assign homework to children.

【Random Math Exercise】Random exercise can develop children's logical calculation ability and integral math ability. The numbers are from 1-100 and exercise having addition, subtraction, multiplication or division.

【Clear Print】This digital teaching stamp roller comes with premium ink which is suitable for most paper and is fade resistant. It is suggested to print it on the back of discarded documents which saves paper and is eco-friendly.

【Reusable Teaching Stamp】The digital teaching stamp roller is easy to refill the ink and a transparent storage box prevents ink from spilling. The ink can be refilled with 5-8 drops on the side of the roller stamp when it runs out of ink and wait a few minutes for the ink to absorb before continuing to use.

【Perfect Gift for Children】The digital teaching stamp roller is small and exquisite which the to carry and put in stationery box. It is a unique gift for children to improve math skills and improve concentration.