You can find the template I used here: http://www.creatingkeepsakes.com/articles/fry_box_download
For Frankenstein, I used a paint pen to draw the face in, used a white pen to draw the stitches, added google eyes and hand cut the bolts out of silver cardstock. (sorry about the glare on this photo)
For the ghost, I used a black paint pen to draw the mouth and added some google eyes.
You could easily add some tissue paper into these to dress them up a bit and then add small gifts or candy to them.