What is the nicest thing you've ever dont for someone? Why did you do it? How did they respond? How did it make you feel? Why did it make you feel that way?

The nicest thing that i ever done for someone was cleaning up for my gram... her how was kind of messy and so i wanted to clean up.... she was really happy that i cleaned up for her.. it made me feel so happy inside and out... it made me feel that way because doing something for someone and feeling happy about it made me feel that way.. get it??