Fill your sub with tuna.

Cut cheese into two pieces by folding them over into two pieces so they resemble a sail on a boat.

Cut a piece of celery about the size of your cheese, this is what will hold your sails up.

Next, place the celery in the middle of the sub, and place the two pieces of cheese in front of the celery stick so it will hold them up.

Add a few Goldfish like they are swimming and BAM! You have a super fun tuna boat sandwich!