Very nice work. Can I make a few recommendations on your photo taking capabilities?
First you will want more light (possible use the flash on the camera).
Second thing you want to do is to try and take a look at the white balance to get that true color.
The third and final thing you are going to want to do is try taping a white paper to the box to get a even backdrop.
I hope these help you to get better pictures, but I love the models keep up the good work.