Found this idea in the latest issue of Family Fun Magazine.
Here are the ingredients I used:
blue food coloring
Put a drop of food coloring in the cream cheese and mix. Spread on a saltine cracker and put a goldfish cracker on top. Make "seaweed" with celery leaves. You can also use brocolli, bell pepper, thin green onions, or other greens to make the "seaweed".
This is a fun one the kids could also help with. Enjoy your tasty treat!