I only bought mine when DS was 15 months. I didn't use it a lot but used it often enough for it to be really handy. I guess I used it until I fell pg in Feb, so he would have been at least 18mths old and at least 12kg, probably more. It was still wonderful to use it on him at that age/size. The centre of gravity with it is awesome.

I can't wait to use it on my #3