The law pretty clearly describes financial assets. I can't think of one "thing" that doesn't have "value" to someone. A paper clip, a pen, a piece of paper, a used matchstick all have value to somebody for something. So "other thing of value" becomes meaningless in context WRT campaign finances.
As far as I know, Don Jr. didn't "solicit, accept, nor receive" anything of value at or as a result of that meeting either.
What were the Russians "offering" Trump Jr.? Hill's emails? They didn't have them. Receipts for Depends is more likely.