These are not eggs laid by penguins, but eggs with penguins on them. Penguins are themselves a bit egg shaped, so penguin “pysanky” are a natural!
I found the first pattern on line, and had to recreate it for myself because I am a penguin fan. (I have seen more than a hundred thousands of penguins, of five or more species, in four countries on two continents.) The others two patterns I developed, using illustrations from my bird books as a guide. Someday I hope to make a few more of them.....