When Christopher Robin organizes an “Expotition” to the North Pole, his friends are unsure what he means. “We are all going on an Expedition,” said Christopher Robin, as he got up and brushed himself. “Thank you, Pooh.” ”

Going on an Expotition?” said Pooh eagerly. “I don’t think I’ve ever been on one of those. Where are we going to on this Expotition?”
“Expedition, silly old Bear. It’s got an ‘x’ in it.”
“Oh!” said Pooh. “I know.” But he didn’t really.
“We’re going to discover the North Pole.” “Oh!” said Pooh again. “What is the North Pole?” he asked.
“It’s just a thing you discover,” said Christopher Robin carelessly, not being quite sure himself. “Oh! I see,” said Pooh. “Are bears any good at discovering it?” “Of course they are. And Rabbit and Kanga and all of you. It’s an Expedition. That’s what an Expedition means. A long line of everybody. You’d better tell the others to get ready, while I see if my gun’s all right. And we must all bring Provisions.”
“Bring what?”
“Things to eat.”

“Things to eat” are never divulged.

See A.A. Milne. Winnie-the-Pooh. Illustrations by Ernest H. Shepard,  Illustrated by E.H. Shepard. New York: E.P. Dutton & Co., 1926. The pen and ink drawings were colorized in 1974.