For example, send them a Valentine with two five-dollar bills (or whatever amount you desire.) One five-dollar bill is your love gifts to them the other five-dollar bill is for them to show love forward to someone in need. This will gives you an opportunity to discuss different options of how they can show love to others. Then ask them to report to you how they showed their love forward.
“Dear Friends, since God so loved us, we also ought to love one another” I John 4:11.