Pamela Allen Grandpa and Thomas

They spend a day at the beach, splashing through the surf, munching sandwiches under a green umbrella, decorating a sandcastle, and wriggling their hands through it to find each others' fingers (remember the joy of doing that as a child?).
As they walk to the beach, Thomas independently carries his bucket and spade; by the end, Grandpa carries everything home including Thomas, while the tide comes in and washes their sandcastle away. And all to the repeated refrain, which sighs like the waves through the pages: "Splish, splosh, splash sings the sea".
Alison Lester Magic Beach

One page depicts, in rhyming words and a beautifully detailed picture, one of the wonders of a beachside holiday: splashing through the waves, building a sandcastle, searching for stones and shells washed up by the tide.
Turn the page, and it shows a smaller, round picture, like a peephole into the imagination of a child experiencing each of these wonders: sea horses thundering towards the land, a castle complete with prince and princess, an overflowing treasure chest. I love to celebrate and encourage my children's imaginations, and this book does it with me.
Shirley Hughes The Big Alfie Out of Doors Storybook

Scruffy haired and rosy cheeked, they enjoy all the normal childhood experiences: arranging soggy cornflakes around a bowl, setting up shop in the backyard, putting boots on the wrong feet, going to the school fair.
One of my favourite Alfie stories is the last one in this book. Do you remember finding that perfect childhood treasure, a smooth, round stone which fitted exactly into the palm of your hand? This is the story of how Alfie's special stone, Bonting, is found, lost among the anonymous stones at the beach, and found again. Perfect beachside reading.