Planning to do the switch soon. She's been in my room in her cot and I think it's time for her to go into her big bed. However I'm a bit nervous about it. Her sister who is 4 is very vocal at bedtime. She shouts and sings. I mainly just leave her and she goes to sleep but if she was doing that with her 2 year old sister in the room it's different. I don't want her to keep her awake. Anyone had any experience with this? Any suggestions on how to do it?