The Gerrer Rebbe, Rebbe Yisroel Alter zt”l (the Beis Yisrael), once commented: “When I was a young child growing up in Ger (Gora Kalwaria), my cheder rebbe used to teach us the story of how Yaakov gave his brother Eisav a soup made of lentils in exchange for the b’chorah (birthright). He would explain the pasuk, “And Yaakov gave Eisav bread and a soup of lentils, and he ate and drank and arose and left,” as follows: Va’yochal – and he ate, without washing his hands for N’tilas Yadayim; va’yeisht – and he drank, without making a brachah on his drink; va’yakam – and he got up, without reciting Birkas HaMazon; va’yeilach – and he left, without kissing the mezuzah. This is the correct way to teach children, for it instills in them an aversion to following the wicked ways of Eisav and draws them to the proper manner of mitzvah observance.