a) I didn't know how, so it was something new to learn.
b) I love how they look and wanted to be able to create something lovely
c) cabling has its roots in Celtic culture, so I liked learning something that is an old world art.
An on-line friend found the pattern at Hello Yarn - web address is http://www.helloyarn.com/irishhikingcarf.htm.
Now I'm on to making a felted lunch sack for Rowan. She is in dire need of a new lunch box - hers has served the family well - having been one Jani used well before Rowan's time. I've not felted before, so decided this was a good project for learning to felt, since the box needs to fit food - but not feet (felted cloggs are also on my list of projects to do.