Money Gift Box & IQ-test :)

This item is meant as a gift. There is a little light in it and before the print is ready, I've put some bank notes in. The only way to open the box is by force. I guess that the more technical the receiver is, the harder it will be to figure it out. If the receiver is a TBBT fan, a hint like ["Do you have any emotional attachments to this box?"](https://www.youtube.com/watch?v=E6jmMp9N6bs) could help :).

So, this thing is printed as a whole with a layer height of 0.2 mm. I did the first fila