It isn't really important that she used a plastic spoon. If she wants to cut her wrist (and/or even commit suicide) she has a big issue. Please, take it seriously. Even kids can get in a depression, search help to get her back out again.

That...that is silly.

However, you still should get that checked out. When I was 8, I threatened to kill myself with a butter knife (thought the butcher knives would hurt too much) and as ridiculous as it was, it was just before my onset of serious depression that I still struggle with.