Tat it

SafetyTat are temporary tattoos that read ‘If Lost, Please Call’ and list a parent or guardian's mobile phone number. Designed to be worn on a child's arm or hand, SafetyTats are easy to apply and are good for amusement parks or other crowded surroundings.
Also available is a waterless 'Quick Stick' tattoo, allowing immediate, on-the-go safety. The inspiration behind SafetyTat was born of necessity when a mom quickly wrote her mobile phone number on her children's arms at an amusement park—in case they got lost.