We have perhaps sixty letter magnets on the refrigerator. James likes the X's. He knows exactly which ones they are. He knows the name of the letter x when he hears it, and if I ask for them, he can extract the X's from the other rabble in short order.
Last night I sat him in front of the computer, opened Notepad, set the font to thirty-six-point, and showed him where the X key was on the keyboard. He got it immediately and was pretty excited.
It's so exhiliarating to see realization dawn on your baby's face.