Sand is made of tiny bits of rock and shell worn down by the sea.
Waves rub rocks and shells against each other for a very long time. Bit by bit they break into the soft sand you dig your toes into.
Sand is made of tiny bits of rock and shell worn down by the sea.
Waves rub rocks and shells against each other for a very long time. Bit by bit they break into the soft sand you dig your toes into.