Build a model of the High Tatras in the sandbox. Whether just for fun and play or for educational reasons. Learning about geography will be more fun for children.
Inner surfaces correspond to the exact elevation profile of the High Tatras, obtained from touchterrain.geol.iastate.edu. The outer surfaces have all sharp edges rounded for the safety of children.
I recommend printing upside down. Firstly for easier removal of supports and secondly to more faithfully preserve the internal shape.
The author marked this model as their own original creation.