I am mentoring two girls for their study plan and by sending them some notes about how they can improve, or books they should read, I can bring joy to them.

I have a close friend, he is studying overseas. We always share things together. By telling him how much I appreciate his presence, I can bring joy to him.

I have sent an interesting video to some of my friends whom I thought would benefit from it. And it brought joy to them.

So simple, just care and express your feelings towards whom you love. And it brings happiness to them <3