Instaed of trying to pound a round peg into a square hole, why not use something made for throwing: Shurikens. When I was a kid my friends and I would buy these 'ninja throwing stars' at the local flea market for about $1.50- 3.00 a piece and have a blast with them for countless hours. Heck, all of the boys in my 7th grade class got once suspended for 2 days for throwing them at trees on the playground as they were asy to conceal and bring to school for throwing fun.