i know this an older post but i figured i'd put my 2 cents in! i nurse my 4 yr olds, my 2 yr old and my baby..not all at once since i dont have an udder...lol, i feel like it some days. i feel its a great way to continue the bond between mother and child as long as both parties are still comfortable..most of mine weaned themselves at age 5 or so...i love the quiet time with them and they still benifit from the breastmilk..gotta love antibodies! it can be a challenge and ppl don't understand my older kids nursing still but we decided before my first was born that we would do the child-led weaning and its totally up to the child when they stop nursing..sorry i know this was supposed to be about tandem nursing but that ties into extended bf so i got on a rant!