I'm pretty sure they want the liver raw, but cooked shrimps are quite allright. Also, raw pieces of cod will go down well! Whatever you do, only give them a little at a time! If you intend to cook it all, don't let them have any raw first, because they may not think the cooked version is so exiting! Oh, and if they're not at least 3 rooms away when you open it, you won't get a chance to cook it!

Let us know what they think.