The Sand Dunes

Yesterday room 5 went to the to the beach.We had to wait for a while because John who is from the museum was a bit late.When he arrived we got going we went on the beach and John told us about sand dunes. We saw the grids where the water washes down if the tide is too rough or high. The grasses protect the dunes. The beach has changed a lot over the years.
Lydia