A how to question for objects in SimPe?

[Braveheart]

I have made a zoo with a number of the zoo animals I've downloaded. My only issue is that when my sims visit the zoo, they have no autonomous interest in 'viewing' the animals. I have to click the animals and say 'view' so sims will do it. How in SimPe do I change the 'attractiveness' value of the animal objects so they are more attractive to the sims and therefore they will view them autonomously? Also I would like to add a greater fun level so that their fun is increased somewhat when viewing the animals. Thanks