We're having DD1's 4th birthday party at the zoo. There will be an hour at the end for lunch (pizza + snacks) and cake.

In your experience, will there any time leftover after food and cake? Should we have some kind of activity for the leftover time? We don't plan on opening gifts at the party.

The party hostess is open to helping us plan this hour "free" time. I'm just not sure if there is enough time for an activity? And if there is, do you have any ideas? It's at the zoo, so something zoo/animal related will be great.