I really belive your safe, they have been exposed to air to long to carry any diseases. I don't know of many diseases that can live that long outside.

You could always take a slightly damp cloth with just a little bleach and water and rub them down some, just to be safe.

I can see how your girls could be interested in them, hanging down like that. If I was a cat, I'd want to play with it. lol It really is some neat looking items.