One of the most important things parents can do is to NEVER let your kids hear you say (or see you act in a way that says…)
“Shver tzu zein a Yid”.
When kids grow up hearing (or feeling) that, though they may not express it, they develop the feeling “so then who needs it?”
Kids have to grow up in an atmosphere that teaches them “Ashrainu! Ma Tov chelkainu!” Being a Yid is the most wonderful fortune a person could ever have!
Although I strongly agree with the idea above, of always having answers to questions available, a kid has to first have the interest to ask the questions. If he or she grows up in joyous Yiddish environment, they will ask the questions when they arise, but if they grow up in an oppressive environment where they feel that the Torah life is a burden, they wont care about answers to specific questions, they will just want to throw away the whole package.