Learning Resources Teacher Incentive Stamps. These fun plastic stamps are great for providing engaging feedback and encouragement to young children. Encouraging messages include “Super!”, “Good Work” and “Needs Improvement”. Set of 30 stamps comes in a plastic storage case for easy organisation. Can also be used by children for peer to peer marking sessions. Each stamp measures 4cm. Out of ink? Take a look at the Learning Resources Jumbo 7Colour Stamp Pad (available separately).