I've been admiring everyone's granny tissue box covers - they're all so colorful. Michelle from: http://theroyalsisters.blogspot.com/ very kindly shared her pattern. She has the tutorial for the "Granny Tissue Box" posted in the right hand column of her blog.
I decided that I would like to have a cube tissue box cover instead of a rectangle tissue box cover and this is what I came up with. It will look pretty sitting on the desk in my crochet room. :)