We gave our DS a pillow (junior/toddler type) during the day sleeps from about 19 months old and he loves it...we also put him to bed with it at night (in the cot) but take it out, although in saying that he's woken the last two nights looking for it so I think it's time to leave it in now (he's 22 months)... He seems to sleep better with it during the day at least.