Great kid lens!
I have both the A 50/1.2 and the DA*55. I prefer AF, because I drink and focusing manually with a beer in one hand is just hopeless (YMMV).
I wouldn't be afraid of the DA*55 though--it has good detail wide open but the bokeh definitely suffers.
I'm going to assume you're looking for stuff from the wider apertures. I'll try to post some I haven't posted before of my girls. Some of these with the K-7, some with the K-x.
f/2
f/1.6 (ok, I've posted this before, but not in colour)
f/2.5
f/2
f/2
f/2.5
f/1.8
f/2.5 -- kinda busy here in the background, but nice colour
f/3.2
f/2
f/2.5
f/2.2
f/2.8
f/1.6
f/4