Hold an elephant-stomp race (players wear big cardboard feet tied to their shoes) or a push-a-peanut-with-your-nose relay.
Play zoo animal charades.
Serve lion cupcakes
Give away tiny stuffed animals -- from the pretend petting zoo you've set out -- as party favors.
Please Bug Me
Play ladybug tag (try not to get tagged with a stick-on homemade ladybug).
Make antennae headbands.
Enjoy a gummy-worm-topped "dirt" cake (with crushed Oreo cookies on top).
It's a Jungle in There
Have guests beat on drums they've made out of oatmeal containers and rubber sheeting.
Challenge little monkeys to pick up shelled peanuts with their toes.
Tape-record Tarzan yells and then vote on a winner.
Serve a cake decorated like a drum, along with tropical fruit punch, of course.