Create a minimalist version of the child-friendly keyring concept, removing all unnecessary decorations. The design should focus on clean lines, simplicity, and functionality while still being identifiable as a non-electronic stamping device for emergency situations. Use neutral colors and maintain the core function of imprinting user's identity and contact details in a form like a complicated braille, without any additional cartoon-like elements or bright colors. The keyring should be intuitive for children to use but with a straightforward, no-frills design.