[OnTheJourney]

I second the half round (nursing pillow). Even when DS could sit up and play with toys, I still put it around him. He liked to throw himself back for fun! DS was sitting for about five minutes at 6 months but he was probably closer to 8 months before he quit toppling over regularly. He was just over 9 months before he could get into sitting position from tummy.
My nephew is 7 months and cannot sit up at all except with the bumbo, my neighbour I babysat was 9 months before she could sit unassisted for even a few seconds and nearly 13 months before she could get into sitting from tummy.
Kiddos are all so different!