The Medford Public Library presents another Teen Bad Art Night for teens in grades 6 to 12. It’s paint night with a twist: Will you paint happy little trees or happy little accidents? Follow along with a paint tutorial and a huge secret obstacle in your way. Space is limited for this after-hours event and sign-up is required through the library’s online calendar. Questions? Contact Nicole Perrault of the library staff at nperrault@minlib.net or 781-475-5735.