I noticed I keep discussing tutorial videos from Stiltbeast Studios in December, which might give the impression he only does spooky Christmas props. This is not the case at all and I want to focus on one of his more traditional tutorials. If you have access to chunks of foam and fake blood, then you can make some realistic fake organs following the directions in the following video:
This tutorial could come in handy if you don’t have any fake blood:
Be sure to check out his other videos!