This Colop stamp will make hand washing fun for children, encouraging them to wash their hands at regular intervals during the day. Simply stamp the palms and backs of hands with the dermatologically tested ink and watch the imprint gradually fade away through regular hand washing. Offering 3,000 impressions, the certified ink, along with the added protection of Microban antibacterial solution on the stamp, means children can protect themselves from the spread of germs in a playful way.