I explained my children about Leukemia and the Society, and about what I am doing to contribute to the Research for the cure.
I asked them to talk to their friends about that and try to collect 1 dollar from each (they have a bunch of friends! I just started to to that, I will let you know if it worked!
I am also going to put a small box in a visible place in my house with the TNT logo; usually the weekends my house is really full of friends going back and forth. Spending the night, eating and drinking at my house, playing... I am happy with it. But from now on, as an idea of "conciousness and moral education" I will use the box as a weekend donation for shelter Haha!!! 
I really want to involve children on these issues, because I believe they are growing thinking they live in Disneyland. And the truth is nothing but the opposite for the rest of the world.
I hope you enjoy these ideas... good luck on your Fundraising 
The future belongs to those who believe in the beauty of their dreams..... Eleanor Roosvelt
Olga