About this 3D model

Never thought it would ever work when I designed this, but it printed flawlessly without any supports. And it's surprisingly strong. Clicks right in place. Just be carefull with the latches on the cover, those can be broken easily but once in place, there's no force on them. My daughter broke the first one I printed in PLA so I made them in polycarbonate (the transparant ones in the pictures)