Bananas are good. They contain zinc. And can be made to look EXACTLY like penguins. Here's how:
Take a banana, any banana. In these enlightened times, a straight one works just as fine as a bent one. Hold the banana with the stalk bit pointing up, the curve of the banana pointing away from you. Almost as if the banana is a longbow and you're about to fire it.
Grasp the stalk and yank it backwards. The skin around the front of the stalk should crack easily. Pulling on the stalk, you should be able to peel backwards, down the outer, long curve of the banana. Ideally, you should have about a third of the circumference of the banana attached to the stalk, two-thirds still gripping the soft flesh. You might need to tear a bit to make that work. This is within the rules.
Now confront the two-thirds of skin gripping the inner curve of the banana. Split it down the middle, to about half the length of the banana. Let the flaps flap. I'm sure your flaps will be much more evenly distributed than mine; no matter. Can you see what it is yet?
Now flip the stalky flap back up, so it rests on the top of the banana. Say, that stalk looks EXACTLY like a penguin's beak. And those side flaps are EXACTLY like it's wings. Hot damn and hot diggedy, you've achieved alchemy! And must be burnt as witch.
Amaze your friends! Baffle your enemies! And chuck some money at Comic Relief.