This is Sarah’s favourite sitting position.
She will move through the position during play. All these while, I never bothered until a friend advice me better to discourage Sarah’s in this sitting posture.
My friend says that her daughter is a W-sitter too and it caused her walk with knee and feet turned inwards and keeps falling over. After some internet search, it’s verified that what I was told is true concerning to the sitting posture and its consequences.
According to the orthopedic expert, children choose W-sit because this position requiring less muscular involvement, having a wider base of support thus allowing them to have closer access to toys; but most kids will out-grow their W-sit day as they grow older (hopefully for Sarah too).
So the other day when I try to get Sarah sit with other postures, it only last few seconds and later she goes back to her old way again.
I am not dead set against W-sitting. But I will try to correct her positioning in the way without drawing her attention and encourage a more body-friendly posture whenever I sit near to her.