ECR4Kids Motivation Teacher Stamps - Mess-Free Self-Inking School Grading Stamp Set with Storage Tray (8-Piece Kit) Encourage Greatness  colorful classroom stamps with motivational messages such as "Out of this World" and "Super Star" Mess-Free Inking  individual ink reservoirs automatically re-ink stamps after each use to make marking papers and assignments quick and effortless Classroom Champions  long-lasting stamps makes 30,000+ impressions, ideal for preschool, kindergarten, homeschools or even chore charts at home Kid-Friendly and Non-Toxic  designed for use in schools and around toddlers and small children - stamps feature ink with no acid or lignin Super Fun Designs  cute cartoon accents accompany each message, promoting confidence and academic excellence in every student Handy Storage Tray  convenient carry tray keeps all 8 stamps together when not in use Dimensions  each stamp measures 2" W x 0.87" D x 2.5" H; tray measures 8" W x 2.25" D x 2.75" H