When Leta and I did our second beach walk, she was fascinated by these, but would not touch them. She did slowly warm to the sand and made a mesa-like sandcastle by picking the grains of sand one by one and distributing them like she does cheese with her nachos.
I like how these look a bit like fingers, with the lighter parts at the bottom like finger nails. Kind of freaky if you look at it that way for too long.
SO LOOK AWAY, internet.