But Grzimek was an excellent marketing man and he wanted to have more visitor coming into the zoo and paying and so he created a lot of additional attractions. He started a theater in the zoo and they had to pay for the zoo entrance and then they could go to the theater. In winter, there was an ice field. There was a circus building, although never, ever a circus was there but there were operas and so on over there. There were a lot of additional non-zoo attractions. And the more animals he could get, and Grzimek was very, very keen to get a lot of rarities. So he always replaced more common species with rarer species. And the more animals he could get, the more he chased out all these other attractions.