Lego Box

Hello people! The first. Excuse English. My level is pretty basic, so I've used the google translator.
Having said that I told you.
I'm a rookie in this world. In fact this is my first project. It is a lego box to put the gifts for my nephew's birthday (unconditional fan of lego). It is made to the scale that I needed to perfectly fit all the gifts inside. As a good newbie that I am, I can not separate the elements that make up this box, and unfortunately it is all in the same file. Neither change the blissful presentation photo or put more, so I tell you that it is composed of a box, four hollow pivots (to save filament in 3d printing), and a lid with their respective holes where the pivots stick.
Excuse the written billet and my lack of knowledge in the matter. I promise that as soon as I know how to solve this, I will upload it again with all the pieces separately so that it adapts well to the size of the print you need. Greetings.

This thing was made with Tinkercad. Edit it o