I need cute/cool ideas about how to decorate or make for a themed birthday.?

okay, you will probably get sick of this question, because I am going to post it a few times before the actual party just to see some more ideas from what I already have.... The theme is going to be Spongebob/Hawaiian so I am going to have things such as spongebob and friends yellow and green, under water, and then hawaiian like leis and gr skirts palm trees... I just want ideas on how to or what to make for food or decorations... ie: I am using crepe paper(blue) to make little waves on the ceiling so it seems like we are under the sea, I will be using green crepe paper on the wall to make it look like there is seaweed... I will be having a bubble machine in random places around the home... stuff like this.. I just want to make this a good party for my daughter and have really good ideas and things all around. ANY idea will be considered, thank you.