Yeah, that doesn't click for me. Maybe I can remember to go outside and see what my shadow does at that time tomorrow.
I would think if it's a backpack we would see the shadow of the backpack sticking out on the right - where her body shadow is on the ground. I'm still open to the possibility of a backpack, but maybe a smaller one? When my girls were young they had "play" backpack that held small items - they weren't what you see around the schools today. Some even came with little dolls and stuff inside, and one was printed to look like a castle and had two turrets on each end (although my daughter wore it upside down and called it her "rocket"). Also, there are animal shaped backpacks which can be really bizarre in the shape and size. Just something to think about if you think it's a backpack but it doesn't fit your idea of what one should look like.
It does look like straps on the front of her shirt - which seem to move, but that could be her arm. That movement at the end caught me the first time I saw it because I do it to my purse all the time. But like someone said, it could be just her moving her arm.
There are good arguments on both sides, but I'm still undecided on this one. I do appreciate all the pictures posted. You guys have done an AWESOME job!! I watched the video several times but it was really getting to me so I had to stop for a while. She was just so carefree, loving life.