I've been collecting up little plastic flower beads for a long time. The matte finish has a bit of a glow to it in ordinary daylight so I thought they would be perfect lit up. The fiber optic cable was a semi impulse buy (I've wanted to play with fiber optic since I was a little kid and my parents got me one of those glowing flashlights that were more effective at poking eyes out than anything.) The electronics are easy to get at any Radio Shack (though ordering them in is much, much cheaper) and the rest of it can be rounded up with a trip to the craft store.
I'm really proud of the way the battery access is set up. I've been working on a way to do that for a long time. The wiring is all wrapped in shrink tubing.
The finished light has a 3 by 3 inch base, and looks great on a bookshelf (where mine is) and would be fantastic in a little girl princess room as a nightlight.