@gijsje I think you have to see them in real life and in their stunning setting of the cathedral grounds to appreciate them. I wasn't sure before I went to see them either. Hazel has a lovely photo here
I think the fact that they have hares' heads adds an element of softness to the stone and maybe there is madness in there too with the ring-a-ring-a-rosy dance. Wonderful image capture.
Anne, I think the whole exhibition was rather like that!