I, for one, am happy to see a slight return to the toys of old that were "Almost as dangerous as the real thing, only smaller." Yeah, I don't think unsupervised use of this thing is a good idea until you really trust your kid to follow safety precautions. However, there's a decent amount of evidence now that points to kids getting hurt more and more because they expect everything they touch to be danger-proof. See the book, Nurtureshock, for more information.
Logically, that makes sense. Anyone in cub scouts years ago used to carry a pocket knife. But they drilled into you everything from how to safely open the blade, how to cut away from your body, how to pass it to another person, and how to hone it without stabbing yourself.
Now, partly because of schools, there are kids who haven't touched anything more than a butter knife until they were 12. And up to at point in maturity, they might have been safer, but once they are allowed to use anything dangerous, they tend to lack the experience in safe use of such tools or respect for the danger.
Under a "no dangerous toys, no real knifes" household policy, they'll still sometimes break the rules and do dangerous things, but just not openly or with instruction, and thus not safely.
The driving force behind much of this trend to only permit "smooth-edged plastic toys until you're 12" is not safety. It's fear of litigation. If a single parent fails to explain that putting your hand into this blender is very bad, the company gets sued, even if it's not a defective product and even if the dangers were apparent.
I'm not at all saying something like "The old days were better, when a kid could use a knife and stabbing himself was just a way to learn." No. I'm saying exactly the opposite, that he's going to actually have less incidents in his life of cutting himself if you teach him early how to respect and use dangerous tools.
It's the knife version of the condoms versus abstinence argument.
Teach your kids how to use real scissors, how to hold them, how to walk with them. When they're cooking with you, they should use real knives. They should know how to take a hot pot off of the stove or out of the oven. They should know how to use a handsaw, how to whittle, how to use a hatchet, and how to take apart most of a car or any electronics item, even if they wouldn't be able to put it back together.
See also this TED talk which might continue my rant:
5 Dangerous things you should let kids do