trunk or treat preporations

OK, since the trunk or treat at the church is in two weeks we needed to start on the decorations and the costumes. A trunk or treat is like normal trick or treating , except its going around a designated parking lot and getting candy from all the cars (the trunks are decorated with a theme) that are parked there. Since my cousin Nathan wants to go as WALL-E I will need to do a wall-e themed trunk decoration.
Since we will be going with our truck, I'm going to put up cardboard pieces panted to look like WALL-E, EVE, and the AXIOM, as well as a bunch of buildings.
its supposed to look like a scene from the movie. I will put a picture of the decorations on the blog about us going to the trunk or treat. We also need to make costumes for Nathan, Anna, me and possibly Tomas.
As I said before Nathan wants to go as WALL-E, so I'll need to make a box outfit for the main part of him. Because Nathan's going as WALL-E Anna wants to go as EVE. to do that, we need a piece of cardboard to go in front of her so there is the shape of EVE. She will also need to dress all in white including one glove (the other one will be black, like EVE's blaster arm). Tomas wants to go as Spongebob even though aunt Rebbecca ready has a pirate costume and decorations, if he does go as Spongebob we will need a piece of cardboard for in front and in back to show Spongebobs face.
As for me, I'm hoping to go in my ninja outfit if I can find another black glove. It has long sleeve dark blue shirt, black sweatpants, a black hat, black gloves, and a dark blue neck girder (a neck girder is like a scarf that's already connected to itself in a tube like shape). I've also got a couple of weapons that might work as a show off piece of the idea.