This Halacha is an excerpt from our Sefer
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Looking at Chametz on Pesach:
There is no prohibition against looking at Chametz on Pesach. Thus, one may enter a store which sells Chametz, and walk through areas where Chametz can be seen, and may even allow a gentile to eat Chametz in one’s home, as explained in Halacha 10.
 Admur 440:2-3
 The reason: As the verse states “Lo Yiraeh Lecha, which teaches us that only one’s own Chametz may not be seen, while the Chametz of others are permitted to be seen. [Admur ibid]