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