Teacher's stamp features a self-inking design to let you quickly create multiple impressions of a smiley face with the word "Outstanding!" to encourage and motivate your students. Self-inking operation requires you to simply press down and repeat to create hundreds of thousands of clear, crisp impressions. Easy-to-replace cartridge provides a quick, clean way to change your depleted cartridge. Water-based ink formula is nontoxic for safe handling and use.