Laura, you got it.  The Julia.  It’s in the book all ready to go for you, and you can do your choice of yarn types/sizes in two gauges/sizes.  The whole thing is six stitches long, repeated forever. (I know–you said counting to four was your limit.  Heh. I don’t think you have to count with this one, though, so it’s all good.)  Purl straight across the back every time.  If you want to, when the boys are in bed, you can do the zig zaggy optional bottom edge.  Or not.  Me, I finally bought a Weight Watchers scale so I could measure grams so that I could figure out how much yarn I was using per row and thus when to start into the bottom edging and have enough if I knew I was running short.  (Note the lack of bottom edging on this one.  I like the seashell effect of leaving it plain, too.)

The larger-stitch-count Julia, by the way, is the pattern I used for the Knitpicks merino yarn you dyed and totally surprised me with at TKGA a year ago.  It’s a little thicker than most fingering weights I use, and this is how it looks knitted up on my size 9 (5.5mm) needles.  Funny that you should ask for plain and simple, and, hey, looky what I knitted last fall!