Since we didn't have preassigned seats for today's flight to Chicago, I had to sit several rows away from the kids. The airline rep managed to get them all seats in the same row, so they didn't care. It was actually great to be able to say, "Sorry kids, you'll have to sort all your squabbles by yourselves, I'm all the way up here and I can't get past the line to the bathroom"! They were good as gold, keeping themselves busy with their activity books and the PSP:
It looks like some other parents had the same idea -- the 3 boys seated across the aisle from my kids were flying solo, and each of them had a PSP!