As a former teenage girl, I can confirm that it's almost scary how up-to-date teens are on ~the trends~. In the time it took you to read that sentence, they probably deemed last month's viral water ...
Promise. Let's all just agree on this—thinking of something cool and fun and trendy (or whatever) to buy for a tween girl is intimidating. Between their ~attitudes~ and their, uh, scarily up-to ...