The Medford Public Library invites teens in middle school and high school to have henna applied to their hands by a professional artist. These tattoos will remain for approximately one week.  Space is limited. Registration is required through the library’s online calendar. Also required is a permission slip signed by a parent or guardian. Permission slips will be available April 1 in the Teen Section and online at medfordlibrary.org. Signed slips can be passed in early or brought to the event. Henna will be applied in order of arrival to the event.