Q. should we practice saying: ‘I love you for Allah.’ More so, can I use it to kids I teach?
A. To use this phrase upon people that would understand it as Muslims intend it would be a blessing. To use these blessed words upon a male or female in a context in which the words would be taken out of context would also be wrong.
One should teach children about the importance of love and affection. You should teach them as to the proper usage of this Hadith and its relationship to creating mutual affection between peaceful people.
Allah Certainly Knows Best.