Dreadfairy says:
I had to get rid of my extensions to be a teacher, and I needed a temporary look, and my hair is too short for falls. So I decided to go for a wig. I made about 55 pairs of double-ended dreads to begin with.

1. First, I got a pair of tights and then cut the legs off. You might want to check they fit fairly tight to your head first, as the weight of the dreads may cause it to slip a bit if it's too loose. Although my blue wig is a bit loose, but a few (about5) well-placed grips secure it for a whole night of patying!

2. Next I sewed about two thirds of the dreads around the edge. I used the same amount of dreads as I would if i was attaching to my head, so theres about 55 in this wig, so I put about 35-40 around the outside. You would want to adjust these numbers if you like thinner dreads.

They are stitched towards the middle for about an inch. To make one with a pony tail they should all be stitched towards one high central point, but to make one with bunches stitch towards two points, where you want the bunches to be, it will also need a parting (see below)

As they are only stitched for about an inch the direction isn't too important as most of the dread can be positioned however you like.

4. Next I sewed up the hole in the back. I don't think this stage is that necssary, in fact if you had long hair it might be advantageous to leave the hole open, as then you could tie you hair up, pull it through the hole and tie the dreads around, in a semi-fall manner

5. The remaining third of the dreads need to be sewn on as a second layer starting about 3/4 of an inch back from the hair line. Stitch them in the gap between dreads. As you only have a third, they obviously need to be evenly-ish spaced around, so as a general rule, stitch one, leave 2 gaps, stitch one etc.

They don't have to be exactly evenly spaced all the way round, so if you have two biggish gaps next to each other stitch a dread in both these places. You need to use less dreads in the second layer than the first to keep the wig head-shaped.

Originally I had intended to do a thgird layer, but I found two layers had enough coverage. If you want thinner dreads you may need a third layer. As with the second layer, the third layer needs less still dreads in.

6. I then just tied the dreads up into bunches

7. Once it was tied up I attached the little front dreads by hooking them under a dread and pulling the end through the loop...but I guess you could stitch them.