How can a twelve-year-old girl be convinced of God’s existence and proven by logic and reason, rather than by the Quran?

If it is proven that the wife is a polytheist and not from the People of the Book, then it is obligatory to separate from her if she does not believe in Allah alone, as Allah Almighty says: "And do not hold on to the bonds of disbelieving women." As for how to save the daughter from atheism, it is by introducing her to the magnificent creations of Allah, such as the sun, moon, stars, earth, living creatures, and the human body and its senses, all of which indicate the existence of Allah Almighty. It is necessary to use methods of encouragement, endearment, and excitement, and to utilize educational computer programs that foster faith and instill the love of Allah in children.