This craft calls for a certain kind of stencil but I think just any other kind of stencil will work or even just a cut out of something Christmas-y would work. They painted over this with white acrylic paint.
Included are a colored mask and an outline of a mask for students to color themselves. Print the mask on construction paper or cardstock, cut it out, then attach it to a sentence strip (or stapled strips of paper) around the child's head. You can have a classroom full of Santa's for Christmas!