When did you know your baby/child was ready for a pillow??? Did you go by your baby or an age?? My daughter is 9 months and has been waking up constantly in the night. Last night she slept with a firmish flat pillow and slept 6.5hrs straight....this is in comparison to every 45mins the night before. She has the instinct to turn her face to the side when she rolls over on to her tummy when on her mattress. And I've watched her sleep on the pillow a couple of times when we've been at friends houses etc. and she's so much better. But I also don't want to risk her safety. ETA: She doesn't even roll on to her tummy with her pillow because she's so comfy!