I'm going to create a picture for you. Close your eyes, wait, nevermind you can't or else you won't be able to read this. Anyways. You're four-years-old and your parents have just taken you to the beach. They pack the funky life jacket, some pb&j sandwiches, a couple juice boxes, and a bucket and matching shovel. You just know it's going to be an epic day building sand castles all day.
This still happens for grownups at the beach, except now they're exchanging juice boxes for ciders and sand buckets for chisels, as they create literal art out of sand.