BEST backpack for Back to School!

We have finally found the answer to our backpack prayers: a backpack that my girls can carry on their own, that won't cause scoliosis (curvature of the spine), is durable, and looks SO cool! It's called the Zuca, and we LOVE ours!! The girls got them with a hot pink frame, flashing wheels, and a (get this!) white write-erase bag - see the pics! Their friends leave them notes right on the backpack. The Zuca is essentially a locker on wheels. It holds a TON, and the girls can sit on them (the seat can take up to 300 lbs of weight). It has stacked wheels that allows them to easily climb stairs with their bags. Tons of little pockets, cute and colorful - this is easily our fave Back to School purchase. We were so enamored with the bags that we bought them for the store as well - we're the only place in DC to get them! Stop by the store if you'd like to take one for a spin and check them out (and save on the shipping charge).