Sand piles are dangerous objects, they can collapse as quickly as running water, so never let children play near sand piles and definitely do not let them climb on sand piles.
Death from subsidence in sand or swamp is the scenario commonly used in movies, but the reality is not quite the same.
Once upon a time quicksand (quicksand) was an extremely great extraction material for filmmakers.
Quicksand isn't a hell like Hollywood movies still depicting, fooling victims with a peaceful look and swallowing them. Indeed, those who have reached the pile