This project is a nice hard case for your iPod Nano, made from the factory box it comes in from Apple. I made it for protecting the Nano from knocks and scratches when traveling in my airline carry-on bag. As is, it does not provide for playing music while in the case, but in the last step I'll describe an easy mod to make that possible.
Materials you need:
Your iPod Nano, and the factory box. We are going to use the box cover and the piece that holds the iPod in the box (with the little mounting "ears" for the Nano).
One slim bamboo skewer, from the grocery store. The one I used is about 3 mm thick (.125 inch +/-). A thinner one would be fine, too. Don't go any thicker, or you will have trouble flexing the iPod holder plate to get the Nano in and out of the case.
Hot glue gun, glue sticks OR Duco cement. I used hot glue.
Some 3/4" wide velcro, both parts, with sticky backing.
Step 1: Preparing the pieces
2) Cut two pieces of the bamboo skewer to the inside length of the box cover -- they should "just" wedge in comfortably in the cover if they are the right length. These become the case "guides" to center the top side-to-side when closing the case.