Jumping over
One of the girls finally jumped over the fence that separated her from the sculpture and started to attack it with her hands. She repeatedly slapped and destroyed parts of the artwork while laughing and her friend recorded her. By the time she was finished, the piece of work was completely ruined.
We guess that they must have thought that it was funny, to destroy a piece of artwork that was made from sand. It was easy to ruin after all because sand crumbles when touched. The girl would go back a few times and keep messing with the sculpture, for them it was all fun and games.