The latest trend at my 12 year olds school is a blunt butterfly knife 
They are used to do tricks with apparently!
I can't find much information on the Internet about the legalities, other than obviously it's illegal to carry a knife. I can't work out if a blunt butterfly knife is classed as an actual weapon though?
Obviously I am not going to buy him one, ever, and I am contacting the school to let them know that they are being used in the playground, buy doesn't anyone know anything about them? And am I right in thinking that even though they are blunt, they are still dangerous?