Sand and technology don't mix very well. That is why I have gone through quite a few of them. I hate throwing them away until I have got every use out of them that I can.

The sculptures are made with compacted sand You will probably get a good idea of the process by reading https://peakd.com/art/@ammonite/apathy-part-1-compacting-sand-sculpture.

As regards breaking them down. I sometimes get to do that. Here is a video of that. https://peakd.com/hive-156509/@ammonite/yrzbwxzq

Thanks for the comment