Why Lumos?
I've been raising money for Lumos because I know the terrible impact a rough childhood can have on a person for the rest of their lives. Without enough individual love and care, a child feels unwanted and unimportant, and they may find it difficult learning to love themselves and others.
Fiction though it may be, Voldemort is a big example of that. The Harry Potter series means the world to me so JK Rowling is what brought Lumos to my attention.
What I Did
I fundraise by streaming video games live on Twitch.tv. I've been streaming for a couple years now but typically just accepted personal donations. I started to feel guilty about getting donations I don't need, but knew that the viewers enjoyed contributing. So I started announcing that all donations would go to Lumos. The viewers send in donations for the cause while I interact with them and play games. Each contributor has the option of adding a message that is read aloud on the stream. It was received really well and gives so much more meaning to my streams.