Invention assingment, Need ideas!?

Question

My assignment is to create a new & exciting invention, for teen girls only. I don't actually need to create the product, just make it up & put it on a poster (:

I'm stuck so I need help!

One thing I can't use is hairbands that changes hair colour, it's already someone elses idea.

Any suggestions appreciated

Totally fantasy products, stuff we wish we could have but very unlikely to invent (:

Answer 1

A smart fabric, flexible display, battery operated, keyboard controlled dress that can change colour, images, text messages whatever as the wearer wants controlled using a cell phone type controller.

This kind of fabric exists and is being researched for monitoring the wearer's vital functions as a biomedical device.  

Answer 2

colour changing nail polish. A handbag that can be made to look different by changing bows/buttons etc. High heel shoes that convert to flat shoes(already exist). Dress that can be made shorter/longer, made into a shirt, change buttons. I dunno. makeup and phone in one.

Just make something that can do the job of 2 different items.

Answer 3

a guy magnet!