I like the stand, do Ivory's mermaid fin cake on top and sea objects and pirate cupcakes underneath. Purple and Aqua Baby Shower - cupcake tier idea, also Under the Sea themed. just love the colors though!
For a cute way to store stuffed animals, try building this Hanging DIY Toy Organizer. Not only is this an inexpensive DIY toy storage idea, but it's also a very simple shelf design. It looks like the stuffed animals are sitting on swings!