neudmama, although you are 100% right, and since they’re not running a household they have no excuse not to daven… i do have to say, that i know of someone whose mother practically forced them to daven all her life, when she was younger and now, has a hard time davening (they daven but its a bit begrudging i would say). It really has to come on it’s own. you can’t shove yiddishkeit down their throat. On the other hand, they should be gently prodded and reminded about davening so they see it is important.
and, last but not least, the greatest teacher is by example. If the mother makes it her business to daven at least SOMETHING, and the father is always off to shul ON TIME, and it’s lived by example by the parents , the kids will take it in automatically.