Meaning: The children used sand to make structures that looked like castles.
Choice of Words: "Castles" is used to describe the structures made by the children out of sand.
Alternative Expressions
The kids made sandcastles.
Meaning: This sentence has a similar meaning to the first one, but it uses different words. It's like saying, The children were busy building castles out of the sand at the beach.
Choice of Words:Kids is another word for children. Made means to create something. Sandcastles are castles made out of sand.
There were sandcastles all over the beach.
Meaning: This sentence describes a scene where there are many sandcastles on the beach. It's like saying, When I went to the beach, I saw lots of sandcastles that people had made.
Choice of Words:There is a word that refers to a place. Were is a form of the verb to be. Sandcastles are castles made out of sand. All over means in every part of. Beach is a sandy area next to a body of water.