BoingBoing says that
[k]ids' craphoundery [is] compromised by commercialism. Fiona Romeo writes about a BBC program about children and collecting, and the way that the commercialization of collectibles has changed the experience of collecting for kids.
The Big Sister collects things. She'll find something — a bit of fluff, a string, a button — and save it. She has some containers scattered around the house where she puts these things. She calls them her treasures.