The Big House in the Sky
From the Super Mario Wiki
Once the player reaches the four spinning platforms, they need to take the magic carpet to the right. After passing the obstacles on its path, the player needs to take the next carpet on the right before the one they are on falls. The carpet will pass through the upcoming platforms, so the player has to jump over them to avoid getting pushed off, and then quickly return to carpet before it disappears. The carpet will pass through the manor twice, with a flamethrower spewing fire out toward the center of the room. Once the carpet brings the player up to the roof of the building, they can collect the Power Star.
In Super Mario 64 DS, if the player happens to fall off the carpet within the building, using Mario's Power Flower located in that room (and the Mario cap, if the player is not currently Mario) allows the player to reach the roof where the star is located.
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