Rocks on the surface of the Earth can be worn away by the weather into interesting shapes. Rocks can be soft or hard. Soft rock is more likely to be worn away by the weather over long periods of time. Some rock shapes are formed over millions of years.
This clip could be muted and watched by the children and followed by an exercise where the pupils work in pairs to discuss how they think the rocks were formed. They can then share their conclusions with the rest of the class and watch the clip with sound to reveal the manner in which the rocks were formed.