The Stuffed Penguin is one of the most expensive date gifts, Sentiment-wise, in the game (along with the Heart Necklace and Leopard Print Pumps).
To maximize its effectiveness, the Penguin can be played in combination with the Sunflower to gain several extra moves. It also synergizes well with Gold Earrings.
The Stuffed Penguin is one of the four items that can remove all Broken Heart tokens from the grid. The other three are the Stuffed Whale, the Stuffed Bear, and the Stuffed Cat.