【Pre-inked】：Each Stamp set auto re-inks and makes over 30,000 impressions for long lasting use. Easily and quickly marks students papers to note, congratulate, encourage and recognize assignments,and also eliminates mess.^ 【Inspire Students by Fun&Vibrant Designs】：Promote confidence and academic growth with 8 different encouraging、inspiring and instructional messages which include Great workVery GoodExcellentGreat Effort and so on.In addition to this 8 messages, there are 7 bonus fun, cartoon designs, including a smiley face butterflystar & more^ 【High Quality Materials Used&Safe for Kids】：This is a high quality stamper set with premium oil-based ink,safe for kids.Stamps are acid-free and lignin free,the stamp body Is made with sturdy materials,cut with the highest quality laser to ensure a sharp impression every time^ 【Beautiful Design】：Includes 8 stamps with a carrying tray.Each stamp is in a colorful assortment with matching cap to keep the ink fresh and help prevent drying out.Different color options for a more unique custom stamp to suit you in red,pink,orange,green,blue& more^ 【Makes Learning Fun】：Great for grading homework, classroom prizes，to use in the classroom, or for art projects.With these Self Inking Stamps you can motivate your studentsKids in a bright and colorful way that makes learning fun and exciting!