We make dresses that are cool and fit.” What do tween girls want? Not necessarily what the big brands are selling. Stuck in those in-between ages of 8 and 12, tween girls are looking for ...

in 2009, giving tween girls online tools to create one-of-a-kind clothing. She had learned from her Hasbro experience that the market for tween girls -- ages five to 12 -- is lucrative.

But the first run sold out in two weeks. Girls are of course not the only young consumers. Tween boys tend to buy a lot of sneakers and video games. But there's something special about young women ...

Nine- to 12-year-old girls, also known as tweens, unsurprisingly vacillate between childlike interests and adult-esque sophistication. (As the parent of a 9-year-old, I see this up close.) ...