And, if possible, TAKE YOUR CHILDREN WITH YOU!!
One of my most vivid childhood memories is going into the voting booth with my mom. I must have been, oh, 4 or 5, because I wasn't in school yet. But I remember how important and official it all seemed, all the people there, etc. It really showed me how important it is to vote. We make it a point to bring our children with us to the polling places now, to hopefully teach them the same lesson in civic responsibility, by our example.