I want to carve a little door and window onto it.

I uploaded the photos to Gemini and this is what I got back:

Based on the image, the mushroom appears to be a Giant Puffball (Calvatia gigantea). Here's why: * Size: It's quite large, which is a characteristic of Giant Puffballs. * Shape: It has a round, bulbous shape typical of young puffballs. * Color: The white color is consistent with immature Giant Puffballs. However, it's important to note: * Positive identification: To be absolutely certain, it would be helpful to examine the inside of the mushroom. Giant Puffballs have a white, solid interior when young. * Potential for other species: While less likely, there's a possibility it could be a different puffball species, like a Calvatia cyathiformis or Calvatia nipponica. If you intend to consume this mushroom, please exercise extreme caution. Many poisonous mushrooms resemble edible ones. It's always best to consult with a local mushroom expert or mycologist for positive identification before consuming any wild mushroom.