Sandcastle

Tom's sandcastle was destroyed by the storm.

Let's build a sandcastle.

Tom built a sandcastle. Mary then trampled it.

The flood tide destroyed the sandcastle.

My son built a sandcastle.

Let's make a sandcastle.

Tom destroyed Mary's sandcastle with a single swift kick.

Robert made a sandcastle as a last memory on that beach.

He's making a sandcastle.

Gabriel built a sandcastle by the lake.

Children learn the importance of water in soil mechanics from an early age. They learn on the beach while making sandcastles. When they use dry sand, their castle flows into a heap even as they lift the bucket. The particles of sand have no cohesion and little friction between them.