An App sounds good Am not good at Grace before meals (this was where my catholic school was excelelnt for e.g, and we used to have prayers at beginning and end of school, which I don't think that he has now). But this all v helpful thank you niminy.
I think the key thing is letting your child see how your faith shapes your life -- how you live it out. We do grace before meals, and the children see me praying, and we do family prayer time on Sundays (when we can make time in the hurly burly of family life). They know we give money to people who need it (atm doing the Christian Aid Count your blessings app with them), and I try to teach by doing about loving our neighbour as ourselves (pretty hard, that one!). They will make their own decisions about whether they have faith or not, and that's fine. In many ways I think the best I can do is to show them what (trying to) live a Christian life looks like. It's what you do, not what you say, that really carries the weight in the end.