Just to figure out the mystery with the sand in my review. :) It is a real sand and the idea to put the castle on the top of the sand pile was very spontaneous. I didn't even know that we have such a big sand pile on our back yard. I wanted to take pictures of the castle in nearby park but when I saw the sand there was no way back. :)
It took some time to properly clean the castle from sand when I finished photographing. But it was worth it. :)
Thank you for your kind words about pictures, idea and fairytale in my review. :)