the museum sketches are great. i actually don't really mind the "searching" lines this time, it seems to fit. the sculpture looks pretty sweet! ^^ what kind of classes are you taking?
with your sketch of the plane and stuff, try looking at the storyboard thread (maybe in the WIP section?)...there is some good information on how to get an interesting fg, mg, and bg. great concept though, you should carry it thru to a finished piece