DS is 19 months and wondering when to move him to a bed. He seems perfectly happy in his gro bag and cot but DS2 is due in March and will need the cot for him so wondering when to introduce DS to a proper bed and duvet etc and was wondering if Christmas when I am off work would be a good time - he will be 20 months. He is old enough for a duvet and pillow? Sure I read somewhere that they shouldn't have pillowqs under 2? What's the general rule on this?