I made this a good many years ago based on a project in one of the Australian craft magazines. It is very useful. The idea is thet you lay out your patchwork, applique, embroidery, etc. pieces on it and then you can roll it up without misplacing anything. The basis of it is one of those cardboard rolls you can get at the post-office for sending documents you don't want to fold. It is much the same idea as those rolls one sees advertised for jigsaws.
As you can see, I went to town on the embroidery. As far as I remember, there were bits of embroidery arranged like this on the original, but I thought they looked a bit skimpy so did my own thing!