some of the newer skirt hangers (adult) are fairly slimline and the clips move along the rail. I bought a heap and still use them for Darcy's stuff - just move the clips out a bit as she 'graduates' sizes.
They are fine enough that they don't look out of place with her pink plastic hangers.
I have seen some wooden kids hangers with a bar at BigW I think....but I reckon they'd be pretty exxie.