Had some fun reading this article from the Washington Post Book World:
Authors Share Who They Would Spend a Beach Day With
And now, if you can move on from the spectacle of Emily Dickinson in a bikini with Garrison Keillor at her side (don't you think it odd that he thinks of her as a "fictional character") I ask you:
With whom would YOU share a beach day? I grant you two answers, if you wish: one from all of literature, and one from children's literature.
I only have one answer so far:
Reepicheep from the Chronicles of Narnia. I hope I don't regret that choice when he sticks his pin-sized sword into some blowhard's ankle, but strolling along the beach with an armed mouse at my side seems the height of summer fun.