Bruno's father decides that Bruno and Gretel will have a tutor—one Herr Liszt.
Liszt likes history and geography, but not reading and art, which are Bruno's favorites. He tells Bruno he'll learn all about the wrongs that have been done to him, a.k.a. the wrongs Jewish people have supposedly committed against Germans. In other words, get ready for a super racist education, Bruno.
One day, Bruno goes outside and reads the plaque on the bench near the garden: "Presented on the occasion of the opening of Auschwitz Camp, June nineteen forty" (9.523).
Bruno continues walking toward the fence even though he's forbidden to do so.