You'd think that a throwing star would be better for a tree topper. But a throwing star is easier to make as an ornament than a ninja is. Plus, if you had a bunch of ninja ornaments it wouldn't be as cool if they had light up eyes. Heck, maybe it would. But still.
Step 1: Materials
I'll divide these into what you need for the actual ninja, and what you need for the light-up part.
For the ninja:
Black material (I used felt)
Flesh colored material
Needle and thread
Glue (hot glue probably works best)
Some sort of fiber fill
Paper (to make the pattern for the ninja) or you can print the jpg or PDF that are on this step.The PDF is a bit bigger, and on top of our tree it's a pretty good size.
For the light-up part:
Some kind of switch or battery holder with a switch
A soldering iron
Perhaps some extra wire.