I finally got my hands on a variety of Scentos markers! I've been hunting for them for months, and Walmart finally had them in the back to school section. Needless to say, I got 2 of each scent :o)
I may have also come up with a solution for my table tubs. I think I'll get 2 of these for each table, so 2 kids each share one. 2 per table is much better than 4 crayon/pencil boxes per table, right? Then I can paint some extras for my orange and purple tables. They're only 88 cents, I think, so it'd be a very cheap solution!