The modern zoo surely has evolved. What zoo now lacks a carousel or a train ride? In San Francisco, did Joe enjoy the animals? He did. He particularly liked the lemurs, the pachyderms and has decided that the tiger was "Shere Khan," the famous villain of Kipling's The Jungle Book. But he really enjoys the train ride and the carousel and the animal statues and all those things.
Parenting, I think, means that purism must be beaten down regularly.