There are several blog posted on this website requesting ideas for new zombies and new plants. I just recently posted one requesting achievement ideas. Here's an idea for something that hasn't been posted: items. They can either be dropped by the zombies, or bought from Crazy Dave's shop. If it's in Crazy Dave's shop, how much would it cost? If it gets dropped by zombies, what might Crazy Dave say while introducing it? Make sure you give a description about what it does and what it might look like.