This is a pretty cheap and simple way to build kunai from the anime series Naruto. They are pretty light and durable. This is my first instructable and it is for fun, plz dont flame.
Step 1: Gather the Materials..
5 mm. foam board (plenty of it)
1 1/2 cm. wooden dowel (long enough for a handle)
Air hardening clay
Oven bake clay (enought for a ring)
Templates (provided as a picture)
Hot glue gun