How can I do this?

[Pumpkin]

Wondering how I can do this to my pictures.

 

[deprimes]

Its is known as a fisheyelenses.

 

[Yeti]

You can simply edit it in most photo editing programs such as photoshop. Or you can like Unicorn said, use a fisheye lens in place of a normal camera lens.

 

[People]

you can use photoshop or gimp , etc.