Everyone was so kind in their comments about the first collection, I put together another one. I am creating these for myself anyway, so I thought I'd share them in case anyone was interested. They are all transparent png files. I have also drawn some "object" sketches in the same style (things as diverse as an island, paintbrush, pencil, light bulb, speech boxes, etc). If they would be useful to anyone, I can try to post them as well.