Play a CD of jungle sounds by the party's main entrance. Use green streamers to decorate or use large cardboard cut outs of different animals displayed around the room. The favors for the party need to be considered carefully.
The best favors for adults are items that they can use on an everyday basis; think about handing out personalized pens or candles.
If you would like to have aanimal party theme , also try a circus or Noah's ark themed party. (These themes are better for a younger child's party) Guests can be offered a range of props in order to imitate their choice of circus character.
Rent popcorn or cotton candy machines, hire a clown and serve candy apples. A Noah's ark theme is also perfect if you're throwing a party for twins.