Attention teens in grades 6 to 12: Come to the Medford Public Library to have henna applied to your hands by a professional artist! These tattoos will remain for one to two weeks. Sign-up is required and space is limited. To sign up, teens will need a permission slip signed by a parent or guardian. Permission slips will be available in the Teen Section of the library starting April 1, and on the library website. For more information, please contact Nicole Perrault of the library staff at 781-475-5735 or nperrault@minlib.net.