I really think a big piece of Turn and Talk being successful is the modeling and practice when introducing the task to your kiddos, just as you do with Choosing a Partner for Read to Someone. Modeling the correct, incorrect and finally correct way it should look will give you kids that example to follow. Try doing this with topics you know they'd love to discuss, like "What are we going to play at recess?" or "What animals will be see at zoo on our field trip?" might be good ice breakers.
Just for fun, you might try this. Form two lines, facing each other. Set a timer for 30 seconds, and give the kids a topic to talk about. Then have the lines move one person in opposite directions to face a new partner. Set timer again with a new (or the same) topic.
