I'm always on the look out for things to do with my toddler and I was happy my friend brought me here. We went on a Monday, and the downside was the whole town was closed except for the petting zoo. The train runs only on weekends too. Aside from the animals in cages and running around free in the zoo, there were many things for kids to explore and play with.
Having just moved to Vegas, I hear that many locals complain it's not quite as stellar as it used to be. We saw 91yo Bonnie herself on a wheelchair (they said she just had hip surgery) and she was feeding her chickens. The staff has said they don't breed or acquire any new animals, so I guess the place ages with her. Before it becomes completely run down, bring the kids and take lots of photos. It is quite scenic.