We bought a single bed before DD was born and she will go straight from her cot into the single. To start with we'll just put the mattress on the floor to get her used to it and then we'll put it on the frame and buy some sides to attach to the frame. This will then be her bed probably until she moves out of home. It's a great mattress, well made and very comfy. Both DH and I have slept on the single bed at various times when DD was first born to allow the other to sleep undisturbed.