Pre-inkedEach 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 DesignsPromote confidence and academic growth with 8 different encouraginginspiring 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 KidsThis 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 DesignIncludes 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 FunGreat for grading homework, classroom prizesto 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!