The Subtlest Diaper I've Ever Seen

We usually buy Pampers.  Every once in a while we buy a local brand called Titulim.  The design on the Titulim diapers doesn't have any text on it.  It has a pattern of medium-size shapes in subdued blue and purple, like wallpaper.

For a while, I didn't pay much attention to what the different shapes represented.  About a year after moving to Israel, I reflected a little bit on the shapes themselves.  There are six shapes repeated on the diaper: butterflies, balls, bears, baloons, blocks, and stars.

Presumably, the B was chosen because it's the first letter of the word "baby", though of course babies do not appear on the diaper.

The burning question, of course, is what are the stars doing there?  Is the designer going for a higher order of subtlety by including a misfit?  "One of these things is not like the others?"

I cheated by not mentioning something about the stars: they come in pairs (one bigger and one smaller), which suggests that together they form a binary star.

Who designed this thing, an English professor who didn't get tenure?