Do this:
Zip on over to your local grocery, and in the cooking implements aisle, grab a pack of the 6"-9" metal skewers.
Don't get the longer ones.
Return home, set up a carboard box.
Walk off just about any distance you'd like up to 20 feet.
Grab the pointy end of the skewer, and throw at the box.
If your throwing form is even halfway decent, you'll stick that skewer into the box about 90% of the time.
If you use longer skewers, they tend to bend in flight, and become unusable after a couple of throws. Shorter is better.
Enjoy.