Self-locking laser-cut ballot box

This is a ballot box I designed. The design goals were as follows:
* simple
* secure (as in: cast votes should be hidden and unreachable unless the box is opened)
* no screws
* easily disassemblable and reassemblable (no glueing/fixing)

I came up with a design where…
* the bottom is held in place by the sides;
* the sides are held in place by the front and back;
* the front and back are held in place by the top;
* the top is held in place by a single padlock.

Nifty!

With the pad