Yarn or Fabric

There are a few tutorials online - this one is specifically for a travel sized one - http://luannkessi.blogspot.com/2010/...ytutorial.html
and this one....http://www.patchworkposse.com/blog/2...-bag-tutorial/

Here are some others as well....

http://sewing.about.com/library/weekly/aa031098.htm
http://catsnqlts2.blogspot.com/2009/...-tutorial.html
http://www.craftster.org/forum/index.php?topic=348487.0