Wow, great question, but Im 52 so this is an old memory lol
When I was 11 years old, my family went on a caravan holiday to Cornwall. We went with my Dads brother and his family, his wife and two kids, my cousins who were the same age as me and my brother.
The caravan site was situated on a clifftop and had a beach at the bottom which you could get to by following a path under the railway line and down a long flight of steps cut into the cliff face.
The summer of 1976 was the longest, hottest summer on record in the UK and everyday for two weeks, my cousin and I would go off on our own with some snacks and drinks, down to the beach and stay there all day, making moats and hunting in the rock pools for crabs and shrimps and small fish. We'd dig holes and paddle in the sea until our parents would bring us back for tea late in the afternoon.
On an evening we'd go into town and play on the rides and amusements and eat ice cream and fish and chips.
It was real Enid Blyton stuff! Then we'd happily go to bed so tired and looking forward to the following day.
Life was so much simpler back then as a kid. There was no TV in the caravan and obviously no electronic devices and smartphones.
We went on many holidays but this was the one that stood out for me and has made me smile at the thought even as I write this.
Thanks again for a great question and making me recall such a happy memory. Will look forward to reading all the other replies I am sure you will get :-)