The Winner is:

Congratulations to this international team!

Go to the (larger) original file: https://www.geogebra.org/m/xyzhedmr

The second prize goes to: 

Go to the  original file: https://www.geogebra.org/m/y3uzcnsw#material/zhewedtu

The third prize goes to: 

Go to the original file: https://www.geogebra.org/m/y3uzcnsw#material/t5ennk2w

All artwork can be seen in our Geogebra space: https://www.geogebra.org/m/y3uzcnsw

The criteria and the procedure of voting can be seen here!