There could be added a small use for those two items - first it always got me curious why can I rip sheet underwear, but not socks... It should be usable just like all the other clothing items for that small use (it shouldn't make any major difference gameplay-wise, seeing how rare socks are and the cloths for rip sheets are widely available on zombies in the first place, but it would give this item some use, who knows, maybe saving someone's wound in a pinch .
The second thing is crayons, which I think can not be used as a writing tool (correct me if I'm wrong, I don't have a journal to check on my save game). Obviously, they wouldn't make any kind of improvised weapon like pen and pencil, but they certainly could serve as a writing tool for those who feel the need to write some journals - and also giving a use to yet another item :).
Both the requests should be easy enough to implement too, as there is no need to add any new graphic, model or recipe - just add them as another item that can do things already implemented.