That sweater cake is really cute! I was thinking the t-shirt cake could be used this way too, lots of variations to use with that one! I ordered a couple of the boxes and boards (which are a little flimsy and will need more than one layer for safety, should have ordered 4 rather than just 2) for the box of roses, thought it would be good for Mother's Day.
Can't imagine how you'd make a cake box cake, would you have it open with a cake inside? That would be fun, but what would you use for the walls of the box...large cookies maybe, or graham crackers? Could be quite a challenge, but different! Janice