Bwahaha! I have captured your penguin and am holding it hostage. If you want it released, I'm afraid I'm going to need...

a strange twisty thing that goes 'plink'.
Because you're not going to have one of them any time soon, are you now?

a perfectly preserved gooseberry from 1952.
Ditto.

a penguin of my own.
Then I can give yours back. Hah.