"What's black and white and warm all over? A penguin in a wetsuit; a wetsuit is what divers wear to keep them warm in the water. Anyway, Pierre the penguin is 25 years old who lives in California (North America). He is losing his feathers which means he can't swim - it's too cold. So they made him a wetsuit."
Rekik wondered why he could swim in cold water without feathers, but that a penguin couldn't.
"Penguins' feathers are waterproof; that's what keeps the cold water out and so keeps them warm. They don't have fat like we do."