Fuel Injection - explain this to me like I am 6 years old

Ok 6 year old, pull up a stool: EFI uses gas squirted into the intake in a very controlled manner instead of it being drawn in by the rush of air through the carburetor. EFI constantly checks the exhaust to see if there is any unburned fuel left and if it sees any it will reduce the amount of fuel being squirted (called a duty cycle) in to keep it very close to perfect combustion. The 2 different ways to do this is to squirt fuel into the intake manifold where the carb used to be, or squirt it down where the intake valves are so there is very little distance to travel. This is the prefered way to do it as the "mist" that the injectors create does not like to travel past turns and obstructions that are in a standard intake mainfolds runners. The shorter path makes it easier to burn as it is still very finely misted, while the longer path tends to recombine the mist into larger droplets, and that happens alot in a cold manifold on initial startup. You can pull a complete system minus intake for $250 from some other make (eg. Ford) also as long as you get all the sensors and get it from a motor thats about the same HP as yours is. Carbs are nice and simple and can run great, but EFI is about perfect in burning all your gas. So kids, do you have any questions? Ask your mother.....