Once a card game it seems as though Fantasy Flight has nixed this idea completely for plastic penguins! Here's the games description from the game's page itself:
Can you find room for all your penguins on the iceberg?
Reiner Knizia's fast-paced and surprisingly devious new game is fun for the whole family! Stacking penguins in a pyramid may seem easy, but watch out! Penguins will only stand atop another penguin of their own color, and if you're not careful there will be nowhere left to stand!
For 2-6 players, ages 5 and up.
Similar to Pinguïn Party, which is played with cards.