I do like the city walkabout snaps. Judging by the way you sound off, I'd say your son is fairly young (sub ~4?). Also, the third pic looks very perception-awry; I'm inclined to say you shot it as a landscape (horizontally) as opposed to traditional portrait (vertical), but the obscurity of the picture's overall detail of what is captured in it adds a certain allure of the unknown to it; this aspect alone pushes it as my favorite of the bunch.
