Look at this String Art and how to make it using a template. The nails with this wooden and rounded head are really beautiful! Learn how to make it watching this video.
The point that makes this String Art really special are the wooden tacks because the impression is really beautiful. Follow this tutorial (by scraparizate) step by step to make this lovely and simple String Art. You only need a piece of wood or cork, a bounch of tacks and crochet treds. Here you have the free pattern to download.
By Koko90 (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0-2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons