My ex-wife barely even knows the basics of the religion. She only stays because her whole family are in. She calls me sometimes on Saturday/Sunday morning or Thursday evening when she should be in the hall and when i ask shes like "oh, i have a headache." or "i had an appointment" or "it's raining" - you know, the excuses we all made up when we didnt want to go out in service or to the meetings because they're so mindnumbingly boring and nobody actually enjoys them.
My daughter is 3 and only knows the hall is where she goes to see her little friends. She has non JW celebrations and stuff with me. She even asked me when her next birthday is because she loves birthdays. I highly doubt she'd ever become a JW.