“Theo's Poppa was an explorer. He had been everywhere. He kept an old trunk packed with the pictures, postcards, maps and menus that he had collected on his adventures.” Someday, Theo wants to be an explorer, too. For now, it's Poppa's birthday, and Theo has planned a special trip to the beach with him to celebrate. They plot out their course on a map they've drawn and then take the streetcar to the local beach, where they stroll in the sand, hunt for stones and slurp gazpach