How’s that for a big mushroom?

I photographed this mushroom growing in our backyard last week, but I had to go out again this morning as I swear it’s grown twice as big since then! We call it the poison mushroom to deter the kids from touching/eating it, but Zoe couldn’t resist giving it a good poke with the stick. The backyard is still a real mess from a wind storm we had here last month which brought down several large gum trees (thankfully none of them near the house).