We once did something really amazing along these lines. Only once, it was a crap ton of work.

We were fighting this giant demon wall thing. We made it out of Graham crackers and chocolate decorations, which we attached with melted chocolate as glue, basically. It was super creepy - I made demon eyes, oozing blood stuff, it's was great.

As we damaged the wall, we would rip parts of and eat it. It was like a solid 2-3 freaking pounds of chocolate and other assorted things. It was glorious to devour the enemy like that!