No, it's fullproof... as in "full of proof". Fool...
Aww, now I feel stupid and my feelings are hurt...

Aha! Wait just a sec. Dictionary.com is reporting I was correct and Microsoft Word has it that "fullproof" isn't one word.
"Foolproof - Never failing, involving no risk or harm". Thanks dictionary.com.

And to think I almost believed your sarcastic rubbish.

Not really, whilst that post was intended to be humourous, Zoo Tycoon is an inoffensive family friendly game, that does show that (if given as a gift) that you are aware of games that aren't all about killing things, which is a positive character trait.
Well you can bust open the monkey cages and let them jump on innocent civilians. In one of the expansion packs that lets you have dinosaurs you can purposefully not electrify your fence so they get out and eat some people.