The size is not that big, but it requires very long strip of papers...and it's time-consuming to fold. But the result is worth the effort.
As usual, the foldings can be sold if interested.
There are several shapes: the basic one is the square. Then you also have a rectangle and finally an hexagon. I must admit I am not really happy with the hexagon as I feel it's not very beautiful because of the proportions, and it's a bit too tricky to fold. It's enjoyable to play with though. But it was my first try, I will improve myself :-)
Honestly the square is the easiest to fold, and it has the best looking in my opinion. Simple is always good!
The goal is to twist the layers to make nice shapes
I thought I had to make a video, sorry but I was alone to hold my smartphone on one hand and press the start button and twist the layers with my other hand...Not practical....
If you were wondering, it's perfectly normal not to have perfect geometrical square or rectangle. There is always a little something that is "out" of the square for example, and it allows to have these kinetic origami with layers such like that. If you have a perfect square, the layers will be put each over the others and you won't have the same design. I prefer the ones I folded.