There is one thing that  I think that would be good to use in a speech.  It is facebook pages for kids.  Many people have them but lots of others don't.  There are two sides, the ones who think that they are perfect fine for kids, and the ones who think that they are not prefectly safe for kids to use and chat with friends.  This topic would be good because you can use presuasive elements to convince the other side to your side.  This would be a good topic for our class because many people in our class I am sure have facebook pages.  These are the reasons I think that facebook pages for kids would be a good speech topic.