I just found a pretty cool book at the library. If you have boys, or girls of a certain personality, you should give it a look! It's called "100% Pure Fake". There are instructions on how to make fake blood, puke, poop, brains, etc. My boys are lovin' it. It certainly brings out their disgusting- joke nature. So far we have made fake blood, a dead finger in a box, and fake pee which is appropriate since we have three dogs. Next up, edible dog poop made of oatmeal, cocoa powder, green food colouring, etc.