The triangles start with a sheet of 3 x 3.5" cardstock. Mark 1" from top and bottom and then cut from corner to mark, etc until you get two same size triangles.
Santas: SU! scallop punch, word window punch, 1/2" circle punch and my Creative Memories oval cutter for the face.
Penguins: CM oval, SU! Three in One heart punch, banner punch for both the hat and trim.
Trees: lots of scrap paper triangles and a CM star punch