Imagine never feeling the sun on your skin or being forced to hide in the shadows. That's life for a group of children with the extremely rare genetic skin condition Xeroderma Pigmentosum or "XP".
Liam Bartlett has just spent an incredible week with the kids they call the "Moon Children". When the sun goes down, they come out to play, and these guys love company almost as much as they love the camera.
Watch the video.