I actually bought a six-muffin tin - 12 seemed a little overwhelming to me - and filled it with:
- goldfish crackers
- cubes of colby jack cheese
My toddler's first reaction was excitement over the "new" plate she was getting to use. And, in the end, I do think she ate more - and definitely greater variety - of foods than she does at an ordinary lunch. She also spent some time rearranging and mixing up the foods in the various cups, which was fine with me - not the point but fine. If I had two kiddos for lunch, I would probably go with 12 cups because you could always double-up on a favorite. Also, I am hoping to work fruit into the mix, and with more cups, perhaps NHV would be less likely to notice.
Overall, I would say this is worth a try.