With an adult, explore this website from The National Trust and the 50 things to do together:
Discuss which activities you have already done and those you would like to do in the future.
Make a list of the activities you have done already.
Then select a few to write about, recounting the events, e.g.
I went paddling in the sea in Blackpool with my Dad. The sea water felt icy but I didn’t mind. When I walked in the water, I stood on a stone and it hurt myfoot!