You'll need a sharp knife or razor blade for this one, and it will need to be printed on a heavy stock paper if you don't print it on an index card and want to make the coffins. The coffins are a little tricky, all the more reason for two on the card, there's a good chance one of them will be a little rough when finished.
After cutting out the design with scissors or your blade, the best way to make the folds is to use a razor or sharp knife to score the fold lines making sure not to cut all the way through the paper (hence the use of an index card or heavier paper).When you're done, the folds will almost make themselves as seen below. After this, the hard part - fold them in, put some glue on the inside flaps, and press the top "door" down onto them, holding and lightly compressing the entire form to keep its shape for ten seconds or so, so the glue will hold.When you're done you'll have something like what's in the top picture (I did a quick black spray paint job on one of them), assuming you made your dexterity roll. After making enough for a vampire's harem you'll be an expert.