Two sites that offer free patterns for ruffled scarves are RedHeart.com and Instructables.com. Both patterns use mesh yarn rather than fabric and use Red Heart Sashay yarn.
Sachet yarn looks like a thick single strand, but when pulled apart, the yarn becomes a net of holes. These holes allow for a quick cast-on and cast-off with crochet needles. However, these scarf patterns do not require previous crochet experience. The pattern page on Red-Heart.com provides video instruction for the pattern. The design of the yarn makes the pattern easy to repeat since it only requires use of the top row of holes to make the scarf.