Alright, here we go again!
The bottom side is laminated to 1 mm cardboard and attached.
Several laminated plates and tubes are attached.
There are two ways to assemble the prominent Y-piece. You can either use a laminated 2D drawing or - like me - a fully fleshed out version.
A wooden rod is cut to match the length of the front piece in the graphic.
Then regular paper is wrapped around it. The graphic tells you how much paper has to be rolled around it. The kit will not include a colored paper strip for glueing because that would only work if you use the same paper like me. If you use thicker / thinner paper the result will be different.
The side pieces are simple blocks:
They are connected through a middle piece:
The rod is painted grey and inserted into a hole in the middle piece.