This is my little brother (after eating blue candy)...
For his 12th birthday (that actually happened last week but I won't see him until the end of this month so it's ok that I'm starting on this late) I originally planned on making him a stuffed monster:

But since he's such a fan of just about anything gross I thought he might appreciate one of these more...
Roadkill kitty, with guts that come out from a pocket/wound on it's tummy.
The snake would be hollow and you would be able to pull out stuffed versions of his recent meals:

Maybe I'll just make all three. :)