Teacher Stamps in 10 Patterns and Colors: These teacher stamp sets come with 10 patterns: Progress; Keep. These classroom stamps also come in different colors and are great for classroom use, teacher review, feedback, and student rewards. I believe this self-inking stamp will meet all your needs. High Quality Material: The teacher stamp is made of high quality ABS. This is a set of high quality stamps with premium oil-based ink that is safe for children or teachers to use without any danger. Teacher Stamp Use: Ideal as a classroom reward to encourage serious students. It also helps teachers grade student work. Great for classroom and homework for teachers. It is a good helper for teachers. Easy to Use: No installation required, just pour the stamp ink into the small hole, open the bottom cover, print it on paper, and display your beautiful artwork. Wide Applications: Perfect for party favors, teacher classrooms, birthday parties, classroom prizes, carnivals, stationery, greeting cards, scrapbook design, giveaways, holiday gifts and all other uses.