This is one of the basic ideas behind The Light Project- delegating what people have to spare and making charitable work exciting. Any hobby can be useful to someone, any interest could inspire an idea in someone else and any knowledge can be passed on.
I could go on and on all day but to make my point clearly, have a look at these guys. They make toys, they love it, and they are doing good with it.
That's the spirit! :)
http://www.squishable.com/s/charity