Hi Susan, I'm assuming this image isn't from Houzz? Also have you checked out the kitchen and bar stools area on Houzz Products page? You might find these, plus a few similar on there.

Hi Crocker Castle, We bought our tiles from Tile Mega Mart in Smithfield, Sydney. We got ours on sale + further discounts as we bought both exterior and interior tiles from them. Cant remember the exact price of the timber look tile as it was an overall discount. We did get it for a reasonable price and much much less than the advertised price of $129.

Hi Elizabeth, A few inspiration photos for an eclectic, garden room look, do love the black also

Agree grey fabric not so practical for both the above reasons. The white ones look fine and the timber could tie in with your table and bench. But a colour could be good too. Could tie it in with accessories in your kitchen? Artwork? Depends if you're after a more sophisticated, neutral-type colour scheme, or perhaps something with a bit more character/fun. Cheaper stools that will withstand little kid treatment are ideal, and you can always update and change the look if they get wrecked and you want a more grown-up look down the track. Fabulous-looking kitchen by the way :) Enjoy your new home.