i think it would be ok for her to sleep with a toy , just use commonsense as to how fluffy/big it is .. but from 6 months i think its fine ..

but i wouldnt give them a pillow till they are over 1 or in a big bed .. they dont really need it ... having said that ds had a pillow from 10months ( nughty i know but he wouldnt sleep with out one ... ) and we had no problems .... the risk of sids falls after 6 months ...