18 through 25

I want to get moving so it's time to really brainstorm. I'll try for 8 per day.

1. Street vendor. How about selling crepes from the street like they do in France? Or hot dogs? Say $2.5 a pop with lots of Nutella. (Thanks Bart, J-dawgs, and all those frenchies.)
2. Musician feedback: you could give real-time feedback on pitch and or rythm. The violinist or trombonist could learn to get the pitch spot on and refine the ear. I like this because it is so physics oriented and game oriented at the same time. It would almost seem to be a waste to practice scales without it.
3. Musician DDR: DDR is not very different at all from what an excellent music teaching program would be like. If you change the arrows to ordinary musical notes and add a transformer you have a pretty powerful way to learn to play music. And it becomes very game like with learning to site read becoming almost addictive.
4. Nose. This may be a bit beyond me right here right now but it would be very cool to do medical diagnostics using an artificial nose. Like a breathalyzer but with enhanced capabilities. So noninvasive! I read that dogs can use smell to tell if someone has cancer with reasonable accuracy . . .
5. New City Friend You get off the plane in a strange city and after security someone helps you with your carry-on, leads you to your rental car that is ready and waiting, and gets you where you need to go. They know what kind of food you like and what restaraunts would serve it, they have recreation options listed and arrange to have your luggage taken straight to your room without your even seeing it.
6. Tablet Math Every method of entering mathematics onto a computer is a hastle. But it sounds like microsoft has some software that will let you write the math out by hand and will actually be able to interpret it in terms of symbols. That would be pretty cool. Especially if it were then combined with something like Mathematica or Maple or MathCad. It would be like drawing on the chalk board except that the chalk-board could turn around and regraph the equation that you had written more accurately.
7. Fuel Efficiency monitor. How cool would it be to have real-time information on your fuel efficiency? It shouldn't be too hard to keep hooked up to the odometer and the gas tank . . . And people could train themselves to drive efficiently.
8. Pairing rewarders. How about if you have two tags and when they are placed in proximity they give a little reward? When our kids are cleaning up they have the most fun if the bag that holds the legos becomes interactive. If it eats the legos or dings every time a lego enters or anything like that they love it. What if you had some kind of little sticker where something goes and one on the thing and when they get close enough that the item is in its proper place it give off a reward?