The dream in which you are visiting a zoo symbolises the loss of freedom.
If you dreamed that you took the child to the zoo, in real life, you should think about whether there is enough time and attention you give to your loved ones.
Alternatively, a zoo in your dream may represent a chaos of your life. You need to analyse what are you doing and what results you are waiting from your action.
If you see that animals escape from the zoo tells you that you emotions and desires need to be expressed, otherwise locked emotions may affect your work-life balance.