www.primitiveweapons.com/ products/yoyo.jpg shoot, I only had 2 websites on the ancient yoyos. The other one had pic showing the sharp edge yoyo, but it was made in ancient greece!!!
Yeah, you could kill someone with a yo-yo... just about as easily as you could kill someone with the items found on any household computer desk. Cords, blunt objects, and even pointy edges in some cases. Ever taken apart a yo-yo? Sometimes the metal rod holding the two pieces together is pretty sharp.