First thing I thought when I saw the pic, Mom's gonna beat some wholesale ass when she gets wind of this on her carpet.
I started with ferro for my girls. Friction will come later, when they can muster the umph to do it. Friction is going well, they can collect what they need (my oldest gets an Izula for Christmas), and build everything from scratch. The little one still uses CBs, but the big has moved into natural tinder. When we go out side, I can see her mind surveying, looking for that dry grass, or cedar bark that she's trying to find. We even done a, If you had to, using the frayed edges of her blue jeans. I finally found a use for these kids wearing pants way too long.
Most folks don't agree with children playing with fire, and thats just what it is to them. But honestly, after the unsactioned blaze they raised up on our last outing, making fire is pretty common now, and there is no curiosity anymore in burning things. They've done it, been taught how to do it, and they have been given free reign when we camp to start and tend their own fires.
Now that they have been exposed to it, the only desire they have to make a fire is to roast marshmellows. Teach'em, train'em, love'em, and let'em experience life. My wife and I swore that we would protect our girls from the world, but we wouldn't hide it from them.
Moose