Teez what I did with my girls - from the very first night they were home is to NEVER talk to them, switch on the light or play with them when they woke up during the night. I would feed them, but that was it. Nothing else. I would also only change a dirty nappy or really very wet one. I used a very small touch lamp to have a bit of light for that. So basically they would wake for a feed, drink and go back to sleep. They've never wanted to play etc.