Ancient penguin ritual dictates that males present a pebble to their intended, then mate for life. Hubie finds a spiffy stone, but before he can bestow it on Marina, dastardly rival Drake tosses ...

The male penguin digs up the best-looking pebble he can find and offers it to his favorite sweetie. If she accepts the love pebble, they are hitched for life. When animation screenwriters Rachel ...