Meaning: The young people made structures from sand on the land near the ocean.
Choice of Words: Children are young people. Built means to make or construct something. Sandcastles are structures made of sand. Shore is the land next to the ocean.
Alternative Expressions
The kids constructed sandcastles on the beach.
Meaning: This means the same as the first example, but uses different words.
Choice of Words:Kids is another word for children. Constructed is a more formal word for built. Beach is another word for shore.
Youngsters made sandcastles by the water.
Meaning: This means the same as the first two examples, but uses even more different words.
Choice of Words:Youngsters is another word for children. Made is a simple verb that means to create something. By means near or next to something. Water can refer to the ocean or a lake.