CURIOUS CAT:Hello, children. What are you doing? BOY:We're making things out of paper. GIRL:Look, I made a paper hat. CURIOUS CAT:Wow, that's brilliant. Paper is really useful for lots of things.

Costco's ubiquitous Kirkland brand is famous for being mysterious and sometimes surprising -- rumors have spread in the past about its store-brand products being fronts for items of much higher ...