 There are other programs, there's a program called Cut the Rope on an iPad. It teaches you physics and it teaches you mechanical engineering and principles of moment of inertia and you see all these very interesting machines with moving parts operating in gravitational fields with bubbles that float up and there's viscosity and again there's rotational dynamics. You start by playing the game because the rope is swinging and you're trying to cut the rope and the thing swings back and forth and the first puzzles are simple and then they get harder and they get harder and they get harder and then the thing starts moving and the frame of reference starts changing and then at some point adults start to be challenged but the kids just keep going right and the kids just go through the 87 levels. I went to MIT and I studied mechanical engineering and I stared at it and I thought there are a lot of things that this game teaches you. I didn't really figure out until I was a junior in college and then you start thinking well if a six year old starts to figure this stuff out, right? If I can create an electromechanical lab with alternating physical frames of reference and I can give it to a six year old and let them learn at their own rate, how much smarter are these kids going to be, right? How much faster are they going to learn? No one's going to be constrained by the availability of laboratories or tutorial tools. But what if I get a good education on an iPad, right? If I can automate education or project it, then maybe people that don't live in the first world can get just as educated as people that do, 99% of what we have and produce and manufacture and shift and store no longer has any intrinsic value. That 40 million iPads is going to become 350 million tablet computers within the next 36 months to 60 months and it will be a billion sometime out 10 years from now and 20 years from now it will probably be 5 billion. Why do I think 5 billion? Because there's 5 billion mobile phones on the planet and when I was in college there were zero, I'm not that old, 20 years, zero to 5 billion. You know there are more people, more people can access mobile networks in the world that can get access to running water. So network access is greater. And as that happens, right, you've got this profound disruptive egalitarian utilitarian tornado that's blowing through everything. If I can actually provide 12 million books for free to someone with an iPad, then that means I can provide 12 million books to someone for free in the middle of a jungle of Burma.