Jackson is a bundle of energy, and never seems to need to sleep. He often will still be awake at 8:15 or 8:30 (sometimes 9) after being put in bed around 7:30, and in the past 6 months or so he has started to wake up much earlier (for a while it was 6 or 6:30, more recently its been closer to 7). For a while it was really bad b/c he was keeping Dillon up late and waking him up early, and Dill just needs much more sleep than Jackson.
More recently, J has been a lot better about quietly leaving the room in the morning and doing something on his own so Dillon can keep sleeping. The first solution was the "Teacher Anne toy" - a great game with colored pegs that you used to make pictures (by following sample diagrams on a page). Jackson loved it, and was quite good at it (a little better than his brother at tracking how many pegs of each color to put on each row).
More recently, he's been using his workbooks - intro books that are helping him learn to write his letters and numbers, and to practice drawing lines, etc. Jackson loves these, too - he can occupy a full hour of quiet time or in the morning just sitting down and going through them over and over again. He's improving on his writing, but he's still quite a bit behind Dillon on forming letter and numbers.
Jackson is incredibly inquisitive and talkative - he asks about EVERYTHING ("what does XXX mean? Why do you do YYY?" etc.) It's really quite amazing how much that boy can talk! But he's also very smart, and has the most amazing memory. One recent example - the boys had some gummy worms from some party or something, and while J was eating one, he said "Dillon, this is just like the gummy worm we had in the car on the way to Black Butte last year, except that gummy worm had sugar on it too" -- which was true, although this was about 9 months after the BBR trip. He pulls out things like this all the time.
Sometimes we feel like a broken record with Jackson as we try to get him to stop doing something (harrassing either of his brothers, or putting his hands in his pants), and he never listens ... ah the joys of a 4 yr old. But he's a sweet kid, just like his brothers. :)