Brainstorming Idea challenge: "weeklylifeimpact"

This idea is a little raw in my mind. I'm thinking about creating a challenge where participants enter by posting about what they've done within the week that's impacted someone else, it may be or may not be something huge, but that's had positive effect on the person. Examples could be words of encouragement, advise that's helped, financial or any other aid you've given to someone.