The "icicle" design, which involves a wood carving process, is actually not as complicated as it might appear. A good woodcarving knife, a few small files and perhaps a mini-rasp is really all you need to make it happen. You could probably do the work without the knife, but I think starting with the knife and finishing with the file(s) reduces the time necessary to complete the task. It's a great project for a rainy day.