When selecting a child birthday party theme, never select a theme that will endanger the lives of innocent little kids.
Remember you are having a birthday party for children of very young age, so when selecting a theme, select one that they could appreciate.
Recently, I read about an article of a little girl being mauled by a declawed cougar in one of the kid birthday party. I really do not understand why would a cougar appear in a kid party. However special we want our child birthday to be, we must not compromise with safety unless you really want to make the event a really unforgetable one for the worst reason.