OMG I was thinking about this exact thing yesterday!!

DD1 had a cabbage patch doll, it had red hair a bit like mine at the time, when I rocked her she would play with my hair so the doll became a substitute. She lost it while we were out one day & we thought there would be hell to pay but it was ok go figure - every other time it had been gone she freaked.

DS1 had his 'ray' - it was a little satin cami of mine I gave him as a baby cause it had my smell on it (I slept in it) and he must have liked the feel cause nothing else ever wrked as a substitute.

DS2 had my boobs...

AR has her muslin wrap, and a little pink elephant my dad gave her. When she got it I looked at it & said 'oh I know where that will end up'... sure enough she has got the hang of it now & the trunk is chewed & slobbered on the other day she went to sleep on the floor with the trunk in her mouth...she had been slurping away & went to sleep, too cute